@

R3 Slice 3: CongressTrading-Modul + Worker-Log + core_settings auf EF Core

- Modul: CongressTradingDbContext (ct_congressMember/ct_trade) + Design-Time-Factory;
  CongressRepository von Dapper auf EF; CongressTrade.DetailsFetched ergaenzt; Dapper entfernt
- Core: CoreSettingsService (core_settings via EF); WorkerBase-Log auf EF (core_worker_log);
  7 Worker-Ctors DatabaseService -> IDbContextFactory<CoreDbContext>
- CoreMigrations + CongressMigrations (Dapper) entfernt; core_-Schema nun rein EF
- EF-Migration InitialCongressTrading; AddCorePersistence-Fallback fuer leeren Connection-String
  (App startet ohne DB); Connection aus appsettings.Local.json (gitignored)
- Tests: +4 CongressRepository (EF-InMemory) -> 39/39 gruen; Build + smoke-ui + App-Start ok

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
@

LauncherForm.cs

@@ -131,15 +131,15 @@ public sealed class LauncherForm : Form
         if (Enum.TryParse<AppLogLevel>(levelStr, true, out var level))
             _logger.SetMinLevel(level);
 
+        // core_-Schema läuft über EF-Migrationen (extern angewendet). Nur ibkr_ (Dapper) noch hier.
         SetStatus("Migrationen...");
         try
         {
-            await _services.GetRequiredService<CoreMigrations>().RunAsync();
             await _services.GetRequiredService<IBKRMigrations>().RunAsync();
         }
         catch (Exception ex)
         {
-            _logger.Error("Core", "Core-Datenbankfehler beim Start.", ex);
+            _logger.Error("Core", "IBKR-Datenbankfehler beim Start.", ex);
         }
 
         foreach (var module in _modules)

Program.cs

@@ -94,9 +94,9 @@ internal static class Program
 
         services.AddSingleton<LoggingService>();
 
-        services.AddSingleton<DatabaseService>();
+        services.AddSingleton<DatabaseService>();          // noch für IBKR-Marktdaten (ibkr_, Dapper)
-        services.AddSingleton<CoreMigrations>();
+        services.AddSingleton<IBKRMigrations>();            // ibkr_-Tabellen (Dapper); core_ läuft über EF
-        services.AddSingleton<IBKRMigrations>();
+        services.AddSingleton<CoreSettingsService>();       // core_settings via EF
 
         services.AddSingleton<IBKRGatewayService>();
         services.AddSingleton<IBKRMarketDataRepository>();

docs/ARCHITECTURE.md

@@ -94,8 +94,8 @@ Pin `new MariaDbServerVersion(new Version(11, 8, 6))`. Verbindung aus `appsettin
 - [x] `--db-version`-Diagnose (Serverversion für den EF-Pin)
 - [x] **Slice 1:** `Configuration/DatabaseOptions` + `DatabaseServerVersion`-Pin (MariaDB 11.8.6); `AddCorePersistence` (`AddDbContextFactory`) + `CoreDbContext` + Entities (core_position, core_trade_history, core_budget, core_worker_log, core_settings) + Design-Time-Factory; **EF-Migration `InitialCore` erzeugt**
 - [x] **Slice 2:** `PortfolioService`, `BudgetService`, `TradeHistoryService` auf EF (`IDbContextFactory<CoreDbContext>`) umgestellt; **5 EF-InMemory-Unit-Tests** (Buchführung real verifiziert). WorkerBase-Log folgt in Slice 4.
-- [ ] **Slice 3:** Modul-DbContext (ct_) im CongressTrading-Projekt + Umstellung
+- [x] **Slice 3:** Modul auf EF (`CongressTradingDbContext` ct_ + `CongressRepository`); `WorkerBase`-Log auf EF (core_worker_log); `CoreSettingsService` (core_settings); `CoreMigrations`/`CongressMigrations` (Dapper) entfernt; EF-Migration `InitialCongressTrading`; `appsettings.Local.json` (gitignored) als Connection-Quelle; Fallback für leeren Connection-String. **+4 EF-InMemory-Tests** (CongressRepository)
-- [ ] **Slice 4:** Dapper + `DatabaseService` + manuelle Migrationen (CoreMigrations/IBKRMigrations/CongressMigrations) entfernen; IBKR-Marktdaten auf EF
+- [ ] **Slice 4:** IBKR-Marktdaten (`ibkr_`) + `IBKRMigrations` auf EF; dann restliches Dapper + `DatabaseService` entfernen
 - Hinweis: nur build-verifizierbar (Unit-Tests ohne DB); Schema-Anwendung extern via `dotnet ef database update` (env `IBKRTRADER_MYSQL`)
 
 ### R4 – Trading-Kern einфügen

src/IBKRTrader.Core/Database/Migrations/CoreMigrations.cs

@@ -1,91 +0,0 @@
-using IBKRTrader.Core.Logging;
-
-namespace IBKRTrader.Core.Database.Migrations;
-
-/// <summary>
-/// Erstellt alle core_xxx-Tabellen idempotent (IF NOT EXISTS).
-/// Wird einmalig beim App-Start ausgeführt.
-/// </summary>
-public class CoreMigrations
-{
-    private readonly DatabaseService _db;
-    private readonly LoggingService  _logger;
-
-    public CoreMigrations(DatabaseService db, LoggingService logger)
-    {
-        _db     = db;
-        _logger = logger;
-    }
-
-    public async Task RunAsync()
-    {
-        _logger.Info("Core", "Starte Core-Datenbankmigrationen...");
-        await CreateCoreSettingsAsync();
-        await CreateCoreWorkerLogAsync();
-        await CreateCoreTradeHistoryAsync();
-        await CreateCoreBudgetAsync();
-        await CreateCorePositionAsync();
-        _logger.Info("Core", "Core-Migrationen abgeschlossen.");
-    }
-
-    // ─── Tabellen ─────────────────────────────────────────────────────────────
-
-    private Task CreateCoreSettingsAsync() => _db.ExecuteAsync(@"
-        CREATE TABLE IF NOT EXISTS `core_settings` (
-            `key`        VARCHAR(100) NOT NULL PRIMARY KEY,
-            `value`      TEXT,
-            `updated_at` DATETIME DEFAULT CURRENT_TIMESTAMP
-                         ON UPDATE CURRENT_TIMESTAMP
-        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");
-
-    private Task CreateCoreWorkerLogAsync() => _db.ExecuteAsync(@"
-        CREATE TABLE IF NOT EXISTS `core_worker_log` (
-            `id`          BIGINT       NOT NULL AUTO_INCREMENT PRIMARY KEY,
-            `worker_name` VARCHAR(100) NOT NULL,
-            `module`      VARCHAR(50)  NOT NULL DEFAULT 'Core',
-            `started_at`  DATETIME,
-            `finished_at` DATETIME,
-            `status`      ENUM('Running','Success','Error') DEFAULT 'Running',
-            `message`     TEXT,
-            INDEX `idx_worker` (`worker_name`, `started_at`)
-        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");
-
-    private Task CreateCoreTradeHistoryAsync() => _db.ExecuteAsync(@"
-        CREATE TABLE IF NOT EXISTS `core_trade_history` (
-            `id`            BIGINT       NOT NULL AUTO_INCREMENT PRIMARY KEY,
-            `module`        VARCHAR(50)  NOT NULL,
-            `symbol`        VARCHAR(20)  NOT NULL,
-            `action`        ENUM('BUY','SELL') NOT NULL,
-            `quantity`      DECIMAL(18,4),
-            `price`         DECIMAL(18,4),
-            `total_value`   DECIMAL(18,4),
-            `traded_at`     DATETIME,
-            `ibkr_order_id` VARCHAR(100),
-            `status`        VARCHAR(50),
-            `notes`         TEXT,
-            `created_at`    DATETIME DEFAULT CURRENT_TIMESTAMP,
-            INDEX `idx_symbol` (`symbol`),
-            INDEX `idx_module` (`module`)
-        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");
-
-    private Task CreateCoreBudgetAsync() => _db.ExecuteAsync(@"
-        CREATE TABLE IF NOT EXISTS `core_budget` (
-            `module`        VARCHAR(50)   NOT NULL PRIMARY KEY,
-            `total_budget`  DECIMAL(18,2) DEFAULT 0,
-            `used_budget`   DECIMAL(18,2) DEFAULT 0,
-            `max_per_trade` DECIMAL(18,2) DEFAULT 0,
-            `updated_at`    DATETIME DEFAULT CURRENT_TIMESTAMP
-                            ON UPDATE CURRENT_TIMESTAMP
-        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");
-
-    private Task CreateCorePositionAsync() => _db.ExecuteAsync(@"
-        CREATE TABLE IF NOT EXISTS `core_position` (
-            `module`     VARCHAR(50)   NOT NULL,
-            `symbol`     VARCHAR(20)   NOT NULL,
-            `quantity`   INT           NOT NULL DEFAULT 0,
-            `avg_price`  DECIMAL(18,4) NOT NULL DEFAULT 0,
-            `updated_at` DATETIME DEFAULT CURRENT_TIMESTAMP
-                         ON UPDATE CURRENT_TIMESTAMP,
-            PRIMARY KEY (`module`, `symbol`)
-        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");
-}

src/IBKRTrader.Core/DependencyInjection/ServiceCollectionExtensions.cs

@@ -14,8 +14,18 @@ public static class ServiceCollectionExtensions
     public static IServiceCollection AddCorePersistence(this IServiceCollection services, DatabaseOptions options)
     {
         services.AddDbContextFactory<CoreDbContext>(o =>
-            o.UseMySql(options.MySqlConnectionString, DatabaseServerVersion.Value));
+            o.UseMySql(EffectiveConnectionString(options.MySqlConnectionString), DatabaseServerVersion.Value));
 
         return services;
     }
+
+    /// <summary>
+    /// Liefert den Connection-String oder – bei leerem Wert (z. B. fehlende appsettings.Local.json) –
+    /// einen unschädlichen Platzhalter, damit der DbContext-Optionsbau nicht wirft. Die App startet so
+    /// unabhängig von der DB; echte Queries schlagen erst bei tatsächlichem Zugriff fehl.
+    /// </summary>
+    public static string EffectiveConnectionString(string? connectionString)
+        => string.IsNullOrWhiteSpace(connectionString)
+            ? "Server=localhost;Port=3306;Database=ibkrtrader;User ID=root;Password=;"
+            : connectionString;
 }

src/IBKRTrader.Core/Settings/CoreSettingsService.cs

@@ -0,0 +1,48 @@
+using IBKRTrader.Core.Persistence.Ef;
+using IBKRTrader.Core.Persistence.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Core.Settings;
+
+/// <summary>
+/// Key-Value-Zugriff auf core_settings (EF Core). Von Core und Modulen für Fortschritts-/Flag-Werte
+/// genutzt (z. B. "ct.history_import_page").
+/// </summary>
+public class CoreSettingsService
+{
+    private readonly IDbContextFactory<CoreDbContext> _dbf;
+
+    public CoreSettingsService(IDbContextFactory<CoreDbContext> dbf) => _dbf = dbf;
+
+    public async Task<string?> GetAsync(string key)
+    {
+        await using var db = await _dbf.CreateDbContextAsync();
+        var s = await db.Settings.FindAsync(key);
+        return s?.Value;
+    }
+
+    public async Task SetAsync(string key, string value)
+    {
+        await using var db = await _dbf.CreateDbContextAsync();
+        var s = await db.Settings.FindAsync(key);
+        if (s is null)
+            db.Settings.Add(new CoreSetting { Key = key, Value = value, UpdatedAt = DateTime.UtcNow });
+        else
+        {
+            s.Value     = value;
+            s.UpdatedAt = DateTime.UtcNow;
+        }
+        await db.SaveChangesAsync();
+    }
+
+    public async Task DeleteAsync(string key)
+    {
+        await using var db = await _dbf.CreateDbContextAsync();
+        var s = await db.Settings.FindAsync(key);
+        if (s is not null)
+        {
+            db.Settings.Remove(s);
+            await db.SaveChangesAsync();
+        }
+    }
+}

src/IBKRTrader.Core/Workers/BuiltIn/BackupWorker.cs

@@ -1,3 +1,5 @@
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 using IBKRTrader.Core.Database;
 using IBKRTrader.Core.Logging;
 using IBKRTrader.Core.Settings;
@@ -21,7 +23,7 @@ public class BackupWorker : WorkerBase
     protected override TimeSpan? Interval =>
         TimeSpan.FromMinutes(_settings.Settings.WorkerSettings.BackupWorker.IntervalMinutes);
 
-    public BackupWorker(LoggingService logger, DatabaseService db, SettingsService settings)
+    public BackupWorker(LoggingService logger, IDbContextFactory<CoreDbContext> db, SettingsService settings)
         : base(logger, db)
     {
         _settings = settings;

src/IBKRTrader.Core/Workers/BuiltIn/IBKRInstrumentSyncWorker.cs

@@ -1,3 +1,5 @@
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 using IBKRTrader.Core.Database;
 using IBKRTrader.Core.IBKR;
 using IBKRTrader.Core.Logging;
@@ -22,7 +24,7 @@ public class IBKRInstrumentSyncWorker : WorkerBase
     private readonly IBKRMarketDataRepository _repo;
 
     public IBKRInstrumentSyncWorker(
-        LoggingService logger, DatabaseService db,
+        LoggingService logger, IDbContextFactory<CoreDbContext> db,
         SettingsService settings, IBKRGatewayService gateway,
         IBKRMarketDataRepository repo)
         : base(logger, db)

src/IBKRTrader.Core/Workers/BuiltIn/IBKRPriceHistoryWorker.cs

@@ -1,3 +1,5 @@
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 using IBKRTrader.Core.Database;
 using IBKRTrader.Core.IBKR;
 using IBKRTrader.Core.Logging;
@@ -29,7 +31,7 @@ public class IBKRPriceHistoryWorker : WorkerBase
     private readonly IBKRMarketDataRepository _repo;
 
     public IBKRPriceHistoryWorker(
-        LoggingService logger, DatabaseService db,
+        LoggingService logger, IDbContextFactory<CoreDbContext> db,
         SettingsService settings, IBKRGatewayService gateway,
         IBKRMarketDataRepository repo)
         : base(logger, db)

src/IBKRTrader.Core/Workers/BuiltIn/WebApiService.cs

@@ -1,3 +1,5 @@
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 using System.Net;
 using System.Text;
 using System.Text.Json;
@@ -27,7 +29,7 @@ public class WebApiService : WorkerBase
 
     protected override TimeSpan? Interval => null;
 
-    public WebApiService(LoggingService logger, DatabaseService db, SettingsService settings)
+    public WebApiService(LoggingService logger, IDbContextFactory<CoreDbContext> db, SettingsService settings)
         : base(logger, db)
     {
         _settings = settings;

src/IBKRTrader.Core/Workers/BuiltIn/WebserverService.cs

@@ -1,3 +1,5 @@
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 using System.Net;
 using System.Text;
 using IBKRTrader.Core.Database;
@@ -22,7 +24,7 @@ public class WebserverService : WorkerBase
 
     protected override TimeSpan? Interval => null; // Service = permanent
 
-    public WebserverService(LoggingService logger, DatabaseService db, SettingsService settings)
+    public WebserverService(LoggingService logger, IDbContextFactory<CoreDbContext> db, SettingsService settings)
         : base(logger, db)
     {
         _settings = settings;

src/IBKRTrader.Core/Workers/WorkerBase.cs

@@ -1,5 +1,7 @@
-using IBKRTrader.Core.Database;
 using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence.Ef;
+using IBKRTrader.Core.Persistence.Entities;
+using Microsoft.EntityFrameworkCore;
 
 namespace IBKRTrader.Core.Workers;
 
@@ -26,8 +28,8 @@ public abstract class WorkerBase : IWorker
 
     // ─── Infrastruktur ────────────────────────────────────────────────────────
 
-    protected readonly LoggingService  Logger;
+    protected readonly LoggingService Logger;
-    protected readonly DatabaseService Db;
+    private readonly IDbContextFactory<CoreDbContext> _dbf;
 
     public WorkerInfo Info { get; } = new();
 
@@ -35,10 +37,10 @@ public abstract class WorkerBase : IWorker
     private Task?                    _runLoop;
     private readonly SemaphoreSlim   _triggerSemaphore = new(0, 1);
 
-    protected WorkerBase(LoggingService logger, DatabaseService db)
+    protected WorkerBase(LoggingService logger, IDbContextFactory<CoreDbContext> dbf)
     {
         Logger = logger;
-        Db     = db;
+        _dbf   = dbf;
 
         Info.WorkerName = Name;
         Info.Module     = Module;
@@ -153,13 +155,33 @@ public abstract class WorkerBase : IWorker
 
     // ─── DB-Log-Seam (überschreibbar für Unit-Tests) ──────────────────────────
 
-    /// <summary>Legt den Worker-Log-Eintrag an. Kapselt den DB-Zugriff (testbar).</summary>
+    /// <summary>Legt den Worker-Log-Eintrag an (core_worker_log via EF). Kapselt den DB-Zugriff (testbar).</summary>
-    protected virtual Task<long> BeginRunLogAsync()
+    protected virtual async Task<long> BeginRunLogAsync()
-        => Db.BeginWorkerLogAsync(Name, Module);
+    {
+        await using var db = await _dbf.CreateDbContextAsync();
+        var log = new CoreWorkerLog
+        {
+            WorkerName = Name,
+            Module     = Module,
+            StartedAt  = DateTime.UtcNow,
+            Status     = "Running"
+        };
+        db.WorkerLog.Add(log);
+        await db.SaveChangesAsync();
+        return log.Id;
+    }
 
     /// <summary>Schließt den Worker-Log-Eintrag ab. Kapselt den DB-Zugriff (testbar).</summary>
-    protected virtual Task EndRunLogAsync(long logId, bool success, string? message = null)
+    protected virtual async Task EndRunLogAsync(long logId, bool success, string? message = null)
-        => Db.EndWorkerLogAsync(logId, success, message);
+    {
+        await using var db = await _dbf.CreateDbContextAsync();
+        var log = await db.WorkerLog.FindAsync(logId);
+        if (log is null) return;
+        log.FinishedAt = DateTime.UtcNow;
+        log.Status     = success ? "Success" : "Error";
+        log.Message    = message;
+        await db.SaveChangesAsync();
+    }
 
     // ─── Hilfsmethoden ────────────────────────────────────────────────────────
 

src/IBKRTrader.Modules.CongressTrading/CongressTradingModule.cs

@@ -1,10 +1,14 @@
+using IBKRTrader.Core.Configuration;
+using IBKRTrader.Core.DependencyInjection;
 using IBKRTrader.Core.Logging;
 using IBKRTrader.Core.Modularity;
 using IBKRTrader.Core.Workers;
 using IBKRTrader.Modules.CongressTrading.Database;
+using IBKRTrader.Modules.CongressTrading.Persistence.Ef;
 using IBKRTrader.Modules.CongressTrading.Scraper;
 using IBKRTrader.Modules.CongressTrading.UI;
 using IBKRTrader.Modules.CongressTrading.Workers;
+using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 
@@ -22,12 +26,12 @@ public sealed class CongressTradingModule : IModule
     public string Name     => "CongressTrading";
     public string DbPrefix => "ct_";
 
-    // In RegisterUi gesetzt (hat den Provider); für Modul-Migrationen in StartAsync genutzt.
-    private IServiceProvider? _services;
-
     public void RegisterServices(IServiceCollection services, IConfiguration configuration)
     {
-        services.AddSingleton<CongressMigrations>();
+        // Modul-Persistenz: eigener DbContext (ct_-Tabellen) in derselben MariaDB.
+        var conn = ServiceCollectionExtensions.EffectiveConnectionString(configuration["Database:MySqlConnectionString"]);
+        services.AddDbContextFactory<CongressTradingDbContext>(o => o.UseMySql(conn, DatabaseServerVersion.Value));
+
         services.AddSingleton<CongressRepository>();
         services.AddSingleton<CapitolTradesScraper>();
 
@@ -41,8 +45,6 @@ public sealed class CongressTradingModule : IModule
 
     public void RegisterUi(IModuleUiHost host, IServiceProvider services)
     {
-        _services = services;
-
         host.RegisterView(new ModuleView
         {
             Id    = "congresstrading.main",
@@ -56,13 +58,8 @@ public sealed class CongressTradingModule : IModule
         });
     }
 
-    public async Task StartAsync(CancellationToken cancellationToken)
+    // DB-Schema wird extern per `dotnet ef database update` angewendet (keine Laufzeit-Migration).
-    {
+    public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask;
-        // Modul-Migrationen laufen nach der Core-Initialisierung.
-        if (_services is null) return;
-        var migrations = _services.GetRequiredService<CongressMigrations>();
-        await migrations.RunAsync();
-    }
 
     public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
 }

src/IBKRTrader.Modules.CongressTrading/Database/CongressMigrations.cs

@@ -1,80 +0,0 @@
-using IBKRTrader.Core.Database;
-using IBKRTrader.Core.Logging;
-
-namespace IBKRTrader.Modules.CongressTrading.Database;
-
-/// <summary>
-/// Legt die ct_xxx-Tabellen idempotent an.
-/// Namensschema: ct_{tabellenname} gemäß Architekturregeln.
-/// </summary>
-public class CongressMigrations
-{
-    private readonly DatabaseService _db;
-    private readonly LoggingService  _logger;
-
-    public CongressMigrations(DatabaseService db, LoggingService logger)
-    {
-        _db     = db;
-        _logger = logger;
-    }
-
-    public async Task RunAsync()
-    {
-        _logger.Info("CT", "Starte CongressTrading-Datenbankmigrationen...");
-        await CreateCongressMemberTableAsync();
-        await CreateCongressTradeTableAsync();
-        _logger.Info("CT", "CongressTrading-Migrationen abgeschlossen.");
-    }
-
-    private Task CreateCongressMemberTableAsync() => _db.ExecuteAsync(@"
-        CREATE TABLE IF NOT EXISTS `ct_congressMember` (
-            `id`           BIGINT       NOT NULL AUTO_INCREMENT PRIMARY KEY,
-            `bio_id`       VARCHAR(20)  NOT NULL UNIQUE,
-            `name`         VARCHAR(200),
-            `party`        VARCHAR(50),
-            `state`        VARCHAR(50),
-            `chamber`      VARCHAR(10),
-            `profile_url`  VARCHAR(500),
-            `first_seen`   DATETIME     DEFAULT CURRENT_TIMESTAMP,
-            `last_updated` DATETIME     DEFAULT CURRENT_TIMESTAMP
-                           ON UPDATE CURRENT_TIMESTAMP,
-            INDEX `idx_bio_id` (`bio_id`)
-        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");
-
-    private async Task CreateCongressTradeTableAsync()
-    {
-        // Tabelle anlegen
-        await _db.ExecuteAsync(@"
-            CREATE TABLE IF NOT EXISTS `ct_trade` (
-                `id`               BIGINT       NOT NULL AUTO_INCREMENT PRIMARY KEY,
-                `trade_id`         VARCHAR(20)  NOT NULL UNIQUE,
-                `member_bio_id`    VARCHAR(20)  NOT NULL,
-                `issuer_name`      VARCHAR(500),
-                `issuer_id`        VARCHAR(20),
-                `ticker`           VARCHAR(20),
-                `trade_type`       VARCHAR(50),
-                `chamber`          VARCHAR(20),
-                `owner`            VARCHAR(50),
-                `value`            DECIMAL(18,2),
-                `size_range_low`   BIGINT,
-                `size_range_high`  BIGINT,
-                `trade_date`       DATE,
-                `published_date`   DATE,
-                `detail_url`       VARCHAR(500),
-                `details_fetched`  TINYINT(1)   NOT NULL DEFAULT 1,
-                `scraped_at`       DATETIME DEFAULT CURRENT_TIMESTAMP,
-                INDEX `idx_member`     (`member_bio_id`),
-                INDEX `idx_trade_date` (`trade_date`),
-                INDEX `idx_ticker`     (`ticker`),
-                INDEX `idx_details`    (`details_fetched`)
-            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");
-
-        // Idempotente Spalten-Migrationen (für bestehende DBs)
-        await _db.ExecuteAsync("ALTER TABLE `ct_trade` ADD COLUMN IF NOT EXISTS `details_fetched` TINYINT(1) NOT NULL DEFAULT 1;");
-        await _db.ExecuteAsync("ALTER TABLE `ct_trade` ADD COLUMN IF NOT EXISTS `chamber`          VARCHAR(20);");
-        await _db.ExecuteAsync("ALTER TABLE `ct_trade` ADD COLUMN IF NOT EXISTS `owner`            VARCHAR(50);");
-        await _db.ExecuteAsync("ALTER TABLE `ct_trade` ADD COLUMN IF NOT EXISTS `value`            DECIMAL(18,2);");
-        await _db.ExecuteAsync("ALTER TABLE `ct_trade` ADD INDEX IF NOT EXISTS `idx_details` (`details_fetched`);");
-    }
-}
-

src/IBKRTrader.Modules.CongressTrading/Database/CongressRepository.cs

@@ -1,53 +1,65 @@
-using Dapper;
-using IBKRTrader.Core.Database;
 using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Settings;
 using IBKRTrader.Modules.CongressTrading.Models;
+using IBKRTrader.Modules.CongressTrading.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 
 namespace IBKRTrader.Modules.CongressTrading.Database;
 
 /// <summary>
-/// Datenbankzugriff für das CongressTrading-Modul.
+/// EF-gestützter Datenbankzugriff für das CongressTrading-Modul (ct_congressMember, ct_trade).
-/// Kapselt alle INSERT/SELECT auf ct_congressMember und ct_trade.
+/// Fortschritts-Flags liegen in core_settings (über <see cref="CoreSettingsService"/>).
 /// </summary>
 public class CongressRepository
 {
-    private readonly DatabaseService _db;
+    private readonly IDbContextFactory<CongressTradingDbContext> _dbf;
-    private readonly LoggingService  _logger;
+    private readonly CoreSettingsService                          _settings;
+    private readonly LoggingService                               _logger;
 
-    public CongressRepository(DatabaseService db, LoggingService logger)
+    public CongressRepository(
+        IDbContextFactory<CongressTradingDbContext> dbf,
+        CoreSettingsService settings,
+        LoggingService logger)
     {
-        _db     = db;
+        _dbf      = dbf;
-        _logger = logger;
+        _settings = settings;
+        _logger   = logger;
     }
 
     // ─── CongressMember ───────────────────────────────────────────────────────
 
     public async Task<bool> MemberExistsAsync(string bioId)
     {
-        var count = await _db.ExecuteScalarAsync<int>(
+        await using var db = await _dbf.CreateDbContextAsync();
-            "SELECT COUNT(*) FROM `ct_congressMember` WHERE bio_id = @bioId",
+        return await db.Members.AnyAsync(m => m.BioId == bioId);
-            new { bioId });
-        return count > 0;
     }
 
     public async Task UpsertMemberAsync(CongressMember member)
     {
-        await _db.ExecuteAsync(@"
+        await using var db = await _dbf.CreateDbContextAsync();
-            INSERT INTO `ct_congressMember` (bio_id, name, party, state, chamber, profile_url)
+        var existing = await db.Members.FirstOrDefaultAsync(m => m.BioId == member.BioId);
-            VALUES (@BioId, @Name, @Party, @State, @Chamber, @ProfileUrl)
+        if (existing is null)
-            ON DUPLICATE KEY UPDATE
+        {
-                name       = VALUES(name),
+            member.FirstSeen   = DateTime.UtcNow;
-                party      = VALUES(party),
+            member.LastUpdated = DateTime.UtcNow;
-                state      = VALUES(state),
+            db.Members.Add(member);
-                chamber    = VALUES(chamber),
+        }
-                profile_url = VALUES(profile_url),
+        else
-                last_updated = CURRENT_TIMESTAMP", member);
+        {
+            existing.Name        = member.Name;
+            existing.Party       = member.Party;
+            existing.State       = member.State;
+            existing.Chamber     = member.Chamber;
+            existing.ProfileUrl  = member.ProfileUrl;
+            existing.LastUpdated = DateTime.UtcNow;
+        }
+        await db.SaveChangesAsync();
     }
 
     public async Task<HashSet<string>> GetAllMemberBioIdsAsync()
     {
-        var ids = await _db.QueryAsync<string>(
+        await using var db = await _dbf.CreateDbContextAsync();
-            "SELECT bio_id FROM `ct_congressMember`");
+        var ids = await db.Members.Select(m => m.BioId).ToListAsync();
         return ids.ToHashSet();
     }
 
@@ -55,120 +67,85 @@ public class CongressRepository
 
     public async Task<bool> TradeExistsAsync(string tradeId)
     {
-        var count = await _db.ExecuteScalarAsync<int>(
+        await using var db = await _dbf.CreateDbContextAsync();
-            "SELECT COUNT(*) FROM `ct_trade` WHERE trade_id = @tradeId",
+        return await db.Trades.AnyAsync(t => t.TradeId == tradeId);
-            new { tradeId });
-        return count > 0;
     }
 
     public async Task<HashSet<string>> GetAllTradeIdsAsync()
     {
-        var ids = await _db.QueryAsync<string>(
+        await using var db = await _dbf.CreateDbContextAsync();
-            "SELECT trade_id FROM `ct_trade`");
+        var ids = await db.Trades.Select(t => t.TradeId).ToListAsync();
         return ids.ToHashSet();
     }
 
-    /// <summary>Fügt einen Trade ein. Ignoriert Duplikate (INSERT IGNORE).</summary>
+    /// <summary>Fügt einen Trade ein, sofern die TradeId noch nicht existiert.</summary>
     public async Task InsertTradeAsync(CongressTrade trade, bool detailsFetched = true)
     {
-        await _db.ExecuteAsync(@"
+        await using var db = await _dbf.CreateDbContextAsync();
-            INSERT IGNORE INTO `ct_trade`
+        if (await db.Trades.AnyAsync(t => t.TradeId == trade.TradeId)) return;
-                (trade_id, member_bio_id, issuer_name, issuer_id, ticker,
+
-                 trade_type, chamber, owner, value,
+        trade.DetailsFetched = detailsFetched;
-                 trade_date, published_date, detail_url, details_fetched)
+        trade.ScrapedAt      = DateTime.UtcNow;
-            VALUES
+        trade.MemberSnapshot = null;   // transient
-                (@TradeId, @MemberBioId, @IssuerName, @IssuerId, @Ticker,
+        db.Trades.Add(trade);
-                 @TradeType, @Chamber, @Owner, @Value,
+        await db.SaveChangesAsync();
-                 @TradeDate, @PublishedDate, @DetailUrl, @DetailsFetched)",
-            new
-            {
-                trade.TradeId,
-                trade.MemberBioId,
-                trade.IssuerName,
-                trade.IssuerId,
-                trade.Ticker,
-                trade.TradeType,
-                trade.Chamber,
-                trade.Owner,
-                trade.Value,
-                TradeDate     = trade.TradeDate?.ToString("yyyy-MM-dd"),
-                PublishedDate = trade.PublishedDate?.ToString("yyyy-MM-dd"),
-                trade.DetailUrl,
-                DetailsFetched = detailsFetched ? 1 : 0
-            });
     }
 
-    /// <summary>Aktualisiert die Detail-Felder eines bereits vorhandenen Trades.</summary>
+    /// <summary>Aktualisiert die Detail-Felder eines noch unvollständigen Trades.</summary>
     public async Task UpdateTradeDetailsAsync(CongressTrade trade)
     {
-        await _db.ExecuteAsync(@"
+        await using var db = await _dbf.CreateDbContextAsync();
-            UPDATE `ct_trade`
+        var existing = await db.Trades.FirstOrDefaultAsync(t => t.TradeId == trade.TradeId && !t.DetailsFetched);
-            SET  ticker          = @Ticker,
+        if (existing is null) return;
-                 trade_type      = @TradeType,
+
-                 trade_date      = @TradeDate,
+        existing.Ticker         = trade.Ticker;
-                 published_date  = @PublishedDate,
+        existing.TradeType      = trade.TradeType;
-                 details_fetched = 1
+        existing.TradeDate      = trade.TradeDate;
-            WHERE trade_id = @TradeId
+        existing.PublishedDate  = trade.PublishedDate;
-              AND details_fetched = 0",
+        existing.DetailsFetched = true;
-            new
+        await db.SaveChangesAsync();
-            {
-                trade.TradeId,
-                trade.Ticker,
-                trade.TradeType,
-                TradeDate     = trade.TradeDate?.ToString("yyyy-MM-dd"),
-                PublishedDate = trade.PublishedDate?.ToString("yyyy-MM-dd")
-            });
     }
 
-    /// <summary>Gibt Trade-IDs zurück für die noch keine Details geholt wurden.</summary>
     public async Task<IEnumerable<string>> GetTradesWithoutDetailsAsync(int limit = 500)
-        => await _db.QueryAsync<string>(
+    {
-            "SELECT trade_id FROM `ct_trade` WHERE details_fetched = 0 LIMIT @limit",
+        await using var db = await _dbf.CreateDbContextAsync();
-            new { limit });
+        return await db.Trades
+            .Where(t => !t.DetailsFetched)
+            .Select(t => t.TradeId)
+            .Take(limit)
+            .ToListAsync();
+    }
 
     public async Task<int> GetTradeCountAsync()
-        => await _db.ExecuteScalarAsync<int>("SELECT COUNT(*) FROM `ct_trade`");
+    {
+        await using var db = await _dbf.CreateDbContextAsync();
+        return await db.Trades.CountAsync();
+    }
 
     public async Task<int> GetMemberCountAsync()
-        => await _db.ExecuteScalarAsync<int>("SELECT COUNT(*) FROM `ct_congressMember`");
-
-    // ─── core_settings Flags ──────────────────────────────────────────────────
-
-    public async Task<string?> GetSettingAsync(string key)
     {
-        return await _db.QueryFirstOrDefaultAsync<string>(
+        await using var db = await _dbf.CreateDbContextAsync();
-            "SELECT `value` FROM `core_settings` WHERE `key` = @key",
+        return await db.Members.CountAsync();
-            new { key });
     }
 
-    public async Task SetSettingAsync(string key, string value)
+    // ─── Fortschritts-Flags (core_settings via Core) ──────────────────────────
-    {
-        await _db.ExecuteAsync(@"
-            INSERT INTO `core_settings` (`key`, `value`)
-            VALUES (@key, @value)
-            ON DUPLICATE KEY UPDATE `value` = @value",
-            new { key, value });
-    }
 
-    public async Task DeleteSettingAsync(string key)
+    public Task<string?> GetSettingAsync(string key)           => _settings.GetAsync(key);
-    {
+    public Task          SetSettingAsync(string key, string v)  => _settings.SetAsync(key, v);
-        await _db.ExecuteAsync(
+    public Task          DeleteSettingAsync(string key)         => _settings.DeleteAsync(key);
-            "DELETE FROM `core_settings` WHERE `key` = @key", new { key });
-    }
 
     // ─── Reset ────────────────────────────────────────────────────────────────
 
-    /// <summary>
+    /// <summary>Löscht alle CT-Fortschritts-Flags und alle CT-Daten aus der DB.</summary>
-    /// Löscht alle CT-Fortschritts-Flags und alle CT-Daten aus der DB.
-    /// Danach startet der History-Import beim nächsten Worker-Run von Seite 1.
-    /// </summary>
     public async Task ResetHistoryImportAsync()
     {
         await DeleteSettingAsync("ct.history_import_done");
         await DeleteSettingAsync("ct.history_import_page");
         await DeleteSettingAsync("ct.history_import_total");
-        await _db.ExecuteAsync("DELETE FROM `ct_trade`");
+
-        await _db.ExecuteAsync("DELETE FROM `ct_congressMember`");
+        await using var db = await _dbf.CreateDbContextAsync();
+        await db.Trades.ExecuteDeleteAsync();
+        await db.Members.ExecuteDeleteAsync();
         _logger.Warn("CT", "History-Import-Reset durchgeführt – alle CT-Daten gelöscht.");
     }
 }

src/IBKRTrader.Modules.CongressTrading/IBKRTrader.Modules.CongressTrading.csproj

@@ -10,7 +10,11 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Dapper" Version="2.1.35" />
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="8.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.11">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
   <ItemGroup>

src/IBKRTrader.Modules.CongressTrading/Models/CongressTrade.cs

@@ -16,8 +16,9 @@ public class CongressTrade
     public DateOnly? TradeDate      { get; set; }
     public DateOnly? PublishedDate  { get; set; }
     public string    DetailUrl      { get; set; } = "";
+    public bool      DetailsFetched { get; set; } = true;
     public DateTime  ScrapedAt      { get; set; } = DateTime.UtcNow;
 
-    /// <summary>Transient – wird direkt in ct_congressMember gespeichert.</summary>
+    /// <summary>Transient – wird direkt in ct_congressMember gespeichert (nicht persistiert).</summary>
     public CongressMember? MemberSnapshot { get; set; }
 }

src/IBKRTrader.Modules.CongressTrading/Persistence/Ef/CongressTradingDbContext.cs

@@ -0,0 +1,52 @@
+using IBKRTrader.Modules.CongressTrading.Models;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Modules.CongressTrading.Persistence.Ef;
+
+/// <summary>
+/// EF-Core-Kontext des CongressTrading-Moduls (ct_-Tabellen in derselben MariaDB wie der Core).
+/// </summary>
+public class CongressTradingDbContext : DbContext
+{
+    public CongressTradingDbContext(DbContextOptions<CongressTradingDbContext> options) : base(options) { }
+
+    public DbSet<CongressMember> Members => Set<CongressMember>();
+    public DbSet<CongressTrade>  Trades  => Set<CongressTrade>();
+
+    protected override void OnModelCreating(ModelBuilder b)
+    {
+        b.Entity<CongressMember>(e =>
+        {
+            e.ToTable("ct_congressMember");
+            e.HasKey(x => x.Id);
+            e.HasIndex(x => x.BioId).IsUnique();
+            e.Property(x => x.BioId).HasMaxLength(20);
+            e.Property(x => x.Name).HasMaxLength(200);
+            e.Property(x => x.Party).HasMaxLength(50);
+            e.Property(x => x.State).HasMaxLength(50);
+            e.Property(x => x.Chamber).HasMaxLength(10);
+            e.Property(x => x.ProfileUrl).HasMaxLength(500);
+        });
+
+        b.Entity<CongressTrade>(e =>
+        {
+            e.ToTable("ct_trade");
+            e.HasKey(x => x.Id);
+            e.Ignore(x => x.MemberSnapshot);   // transient – nicht persistieren
+            e.HasIndex(x => x.TradeId).IsUnique();
+            e.HasIndex(x => x.MemberBioId);
+            e.HasIndex(x => x.Ticker);
+            e.HasIndex(x => x.DetailsFetched);
+            e.Property(x => x.TradeId).HasMaxLength(20);
+            e.Property(x => x.MemberBioId).HasMaxLength(20);
+            e.Property(x => x.IssuerName).HasMaxLength(500);
+            e.Property(x => x.IssuerId).HasMaxLength(20);
+            e.Property(x => x.Ticker).HasMaxLength(20);
+            e.Property(x => x.TradeType).HasMaxLength(50);
+            e.Property(x => x.Chamber).HasMaxLength(20);
+            e.Property(x => x.Owner).HasMaxLength(50);
+            e.Property(x => x.Value).HasPrecision(18, 2);
+            e.Property(x => x.DetailUrl).HasMaxLength(500);
+        });
+    }
+}

src/IBKRTrader.Modules.CongressTrading/Persistence/Ef/CongressTradingDbContextFactory.cs

@@ -0,0 +1,21 @@
+using IBKRTrader.Core.Configuration;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+
+namespace IBKRTrader.Modules.CongressTrading.Persistence.Ef;
+
+/// <summary>Design-Time-Factory für EF-Tooling (dotnet ef). Connection aus env IBKRTRADER_MYSQL.</summary>
+public class CongressTradingDbContextFactory : IDesignTimeDbContextFactory<CongressTradingDbContext>
+{
+    public CongressTradingDbContext CreateDbContext(string[] args)
+    {
+        var conn = Environment.GetEnvironmentVariable("IBKRTRADER_MYSQL")
+            ?? "Server=localhost;Port=3306;Database=ibkrtrader;User ID=root;Password=;";
+
+        var options = new DbContextOptionsBuilder<CongressTradingDbContext>()
+            .UseMySql(conn, DatabaseServerVersion.Value)
+            .Options;
+
+        return new CongressTradingDbContext(options);
+    }
+}

src/IBKRTrader.Modules.CongressTrading/Persistence/Ef/Migrations/20260728092729_InitialCongressTrading.Designer.cs

@@ -0,0 +1,165 @@
+// <auto-generated />
+using System;
+using IBKRTrader.Modules.CongressTrading.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.CongressTrading.Persistence.Ef.Migrations
+{
+    [DbContext(typeof(CongressTradingDbContext))]
+    [Migration("20260728092729_InitialCongressTrading")]
+    partial class InitialCongressTrading
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.13")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            MySqlModelBuilderExtensions.AutoIncrementColumns(modelBuilder);
+
+            modelBuilder.Entity("IBKRTrader.Modules.CongressTrading.Models.CongressMember", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("BioId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Chamber")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<DateTime>("FirstSeen")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<DateTime>("LastUpdated")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)");
+
+                    b.Property<string>("Party")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("ProfileUrl")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("varchar(500)");
+
+                    b.Property<string>("State")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BioId")
+                        .IsUnique();
+
+                    b.ToTable("ct_congressMember", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.CongressTrading.Models.CongressTrade", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("Chamber")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("DetailUrl")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("varchar(500)");
+
+                    b.Property<bool>("DetailsFetched")
+                        .HasColumnType("tinyint(1)");
+
+                    b.Property<string>("IssuerId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("IssuerName")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("varchar(500)");
+
+                    b.Property<string>("MemberBioId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Owner")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<DateOnly?>("PublishedDate")
+                        .HasColumnType("date");
+
+                    b.Property<DateTime>("ScrapedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Ticker")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<DateOnly?>("TradeDate")
+                        .HasColumnType("date");
+
+                    b.Property<string>("TradeId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("TradeType")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<decimal?>("Value")
+                        .HasPrecision(18, 2)
+                        .HasColumnType("decimal(18,2)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DetailsFetched");
+
+                    b.HasIndex("MemberBioId");
+
+                    b.HasIndex("Ticker");
+
+                    b.HasIndex("TradeId")
+                        .IsUnique();
+
+                    b.ToTable("ct_trade", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/IBKRTrader.Modules.CongressTrading/Persistence/Ef/Migrations/20260728092729_InitialCongressTrading.cs

@@ -0,0 +1,119 @@
+using System;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.CongressTrading.Persistence.Ef.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialCongressTrading : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterDatabase()
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "ct_congressMember",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    BioId = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Name = table.Column<string>(type: "varchar(200)", maxLength: 200, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Party = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    State = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Chamber = table.Column<string>(type: "varchar(10)", maxLength: 10, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    ProfileUrl = table.Column<string>(type: "varchar(500)", maxLength: 500, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    FirstSeen = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    LastUpdated = table.Column<DateTime>(type: "datetime(6)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ct_congressMember", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateTable(
+                name: "ct_trade",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    TradeId = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    MemberBioId = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    IssuerName = table.Column<string>(type: "varchar(500)", maxLength: 500, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    IssuerId = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Ticker = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    TradeType = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Chamber = table.Column<string>(type: "varchar(20)", maxLength: 20, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Owner = table.Column<string>(type: "varchar(50)", maxLength: 50, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    Value = table.Column<decimal>(type: "decimal(18,2)", precision: 18, scale: 2, nullable: true),
+                    TradeDate = table.Column<DateOnly>(type: "date", nullable: true),
+                    PublishedDate = table.Column<DateOnly>(type: "date", nullable: true),
+                    DetailUrl = table.Column<string>(type: "varchar(500)", maxLength: 500, nullable: false)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    DetailsFetched = table.Column<bool>(type: "tinyint(1)", nullable: false),
+                    ScrapedAt = table.Column<DateTime>(type: "datetime(6)", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ct_trade", x => x.Id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ct_congressMember_BioId",
+                table: "ct_congressMember",
+                column: "BioId",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ct_trade_DetailsFetched",
+                table: "ct_trade",
+                column: "DetailsFetched");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ct_trade_MemberBioId",
+                table: "ct_trade",
+                column: "MemberBioId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ct_trade_Ticker",
+                table: "ct_trade",
+                column: "Ticker");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ct_trade_TradeId",
+                table: "ct_trade",
+                column: "TradeId",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ct_congressMember");
+
+            migrationBuilder.DropTable(
+                name: "ct_trade");
+        }
+    }
+}

src/IBKRTrader.Modules.CongressTrading/Persistence/Ef/Migrations/CongressTradingDbContextModelSnapshot.cs

@@ -0,0 +1,162 @@
+// <auto-generated />
+using System;
+using IBKRTrader.Modules.CongressTrading.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace IBKRTrader.Modules.CongressTrading.Persistence.Ef.Migrations
+{
+    [DbContext(typeof(CongressTradingDbContext))]
+    partial class CongressTradingDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.13")
+                .HasAnnotation("Relational:MaxIdentifierLength", 64);
+
+            MySqlModelBuilderExtensions.AutoIncrementColumns(modelBuilder);
+
+            modelBuilder.Entity("IBKRTrader.Modules.CongressTrading.Models.CongressMember", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("BioId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Chamber")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("varchar(10)");
+
+                    b.Property<DateTime>("FirstSeen")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<DateTime>("LastUpdated")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("varchar(200)");
+
+                    b.Property<string>("Party")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<string>("ProfileUrl")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("varchar(500)");
+
+                    b.Property<string>("State")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BioId")
+                        .IsUnique();
+
+                    b.ToTable("ct_congressMember", (string)null);
+                });
+
+            modelBuilder.Entity("IBKRTrader.Modules.CongressTrading.Models.CongressTrade", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("Chamber")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("DetailUrl")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("varchar(500)");
+
+                    b.Property<bool>("DetailsFetched")
+                        .HasColumnType("tinyint(1)");
+
+                    b.Property<string>("IssuerId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("IssuerName")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("varchar(500)");
+
+                    b.Property<string>("MemberBioId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("Owner")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<DateOnly?>("PublishedDate")
+                        .HasColumnType("date");
+
+                    b.Property<DateTime>("ScrapedAt")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<string>("Ticker")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<DateOnly?>("TradeDate")
+                        .HasColumnType("date");
+
+                    b.Property<string>("TradeId")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("varchar(20)");
+
+                    b.Property<string>("TradeType")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("varchar(50)");
+
+                    b.Property<decimal?>("Value")
+                        .HasPrecision(18, 2)
+                        .HasColumnType("decimal(18,2)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DetailsFetched");
+
+                    b.HasIndex("MemberBioId");
+
+                    b.HasIndex("Ticker");
+
+                    b.HasIndex("TradeId")
+                        .IsUnique();
+
+                    b.ToTable("ct_trade", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

src/IBKRTrader.Modules.CongressTrading/Workers/CongressHistoryImportWorker.cs

@@ -1,3 +1,5 @@
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 using IBKRTrader.Core.Database;
 using IBKRTrader.Core.Logging;
 using IBKRTrader.Modules.CongressTrading.Database;
@@ -34,7 +36,7 @@ public class CongressHistoryImportWorker : WorkerBase
 
     public CongressHistoryImportWorker(
         LoggingService       logger,
-        DatabaseService      db,
+        IDbContextFactory<CoreDbContext>      db,
         CapitolTradesScraper scraper,
         CongressRepository   repo)
         : base(logger, db)

src/IBKRTrader.Modules.CongressTrading/Workers/CongressScrapeWorker.cs

@@ -1,3 +1,5 @@
+using IBKRTrader.Core.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
 using IBKRTrader.Core.Database;
 using IBKRTrader.Core.Logging;
 using IBKRTrader.Core.Settings;
@@ -25,7 +27,7 @@ public class CongressScrapeWorker : WorkerBase
 
     public CongressScrapeWorker(
         LoggingService       logger,
-        DatabaseService      db,
+        IDbContextFactory<CoreDbContext>      db,
         CapitolTradesScraper scraper,
         CongressRepository   repo,
         SettingsService      settings)

tests/IBKRTrader.Tests/Modules/CongressRepositoryTests.cs

@@ -0,0 +1,81 @@
+using FluentAssertions;
+using IBKRTrader.Core.Logging;
+using IBKRTrader.Core.Persistence.Ef;
+using IBKRTrader.Core.Settings;
+using IBKRTrader.Modules.CongressTrading.Database;
+using IBKRTrader.Modules.CongressTrading.Models;
+using IBKRTrader.Modules.CongressTrading.Persistence.Ef;
+using Microsoft.EntityFrameworkCore;
+
+namespace IBKRTrader.Tests.Modules;
+
+/// <summary>EF-Repo des Moduls gegen EF-InMemory (deterministisch, kein externer DB-Zugriff).</summary>
+[Trait("cat", "unit")]
+public class CongressRepositoryTests
+{
+    private sealed class Factory<T>(DbContextOptions<T> options) : IDbContextFactory<T> where T : DbContext
+    {
+        public T CreateDbContext() => (T)Activator.CreateInstance(typeof(T), options)!;
+    }
+
+    private static CongressRepository CreateSut()
+    {
+        var ctOpts = new DbContextOptionsBuilder<CongressTradingDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString()).Options;
+        var coreOpts = new DbContextOptionsBuilder<CoreDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString()).Options;
+
+        var settings = new CoreSettingsService(new Factory<CoreDbContext>(coreOpts));
+        return new CongressRepository(new Factory<CongressTradingDbContext>(ctOpts), settings, new LoggingService());
+    }
+
+    [Fact]
+    public async Task UpsertMember_IsIdempotent_ByBioId()
+    {
+        var repo = CreateSut();
+
+        await repo.UpsertMemberAsync(new CongressMember { BioId = "W1", Name = "Alice" });
+        await repo.UpsertMemberAsync(new CongressMember { BioId = "W1", Name = "Alice B." });
+
+        (await repo.MemberExistsAsync("W1")).Should().BeTrue();
+        (await repo.GetMemberCountAsync()).Should().Be(1);
+        (await repo.GetAllMemberBioIdsAsync()).Should().Contain("W1");
+    }
+
+    [Fact]
+    public async Task InsertTrade_IgnoresDuplicateTradeId()
+    {
+        var repo = CreateSut();
+
+        await repo.InsertTradeAsync(new CongressTrade { TradeId = "T1", MemberBioId = "W1", Ticker = "AAPL", TradeType = "buy" });
+        await repo.InsertTradeAsync(new CongressTrade { TradeId = "T1", MemberBioId = "W1", Ticker = "AAPL" });
+
+        (await repo.TradeExistsAsync("T1")).Should().BeTrue();
+        (await repo.GetTradeCountAsync()).Should().Be(1);
+    }
+
+    [Fact]
+    public async Task DetailsFlow_MarksTradeComplete()
+    {
+        var repo = CreateSut();
+        await repo.InsertTradeAsync(new CongressTrade { TradeId = "T2" }, detailsFetched: false);
+
+        (await repo.GetTradesWithoutDetailsAsync()).Should().Contain("T2");
+
+        await repo.UpdateTradeDetailsAsync(new CongressTrade { TradeId = "T2", Ticker = "MSFT", TradeType = "sell" });
+
+        (await repo.GetTradesWithoutDetailsAsync()).Should().NotContain("T2");
+    }
+
+    [Fact]
+    public async Task Settings_RoundTripThroughCoreSettings()
+    {
+        var repo = CreateSut();
+
+        await repo.SetSettingAsync("ct.history_import_page", "7");
+        (await repo.GetSettingAsync("ct.history_import_page")).Should().Be("7");
+
+        await repo.DeleteSettingAsync("ct.history_import_page");
+        (await repo.GetSettingAsync("ct.history_import_page")).Should().BeNull();
+    }
+}

tests/IBKRTrader.Tests/Modules/CongressTradingModuleTests.cs

@@ -45,7 +45,6 @@ public class CongressTradingModuleTests
         var types = services.Select(d => d.ServiceType).ToList();
         types.Should().Contain(new[]
         {
-            typeof(CongressMigrations),
             typeof(CongressRepository),
             typeof(CapitolTradesScraper),
             typeof(CongressHistoryImportWorker),

tests/IBKRTrader.Tests/Workers/WorkerBaseTests.cs

@@ -1,9 +1,9 @@
 using System.Diagnostics;
 using FluentAssertions;
-using IBKRTrader.Core.Database;
 using IBKRTrader.Core.Logging;
-using IBKRTrader.Core.Settings;
+using IBKRTrader.Core.Persistence.Ef;
 using IBKRTrader.Core.Workers;
+using Microsoft.EntityFrameworkCore;
 
 namespace IBKRTrader.Tests.Workers;
 
@@ -26,9 +26,17 @@ public class WorkerBaseTests
         public override string     Module => "TEST";
         protected override TimeSpan? Interval => _interval;
 
+        private sealed class InMemoryFactory(DbContextOptions<CoreDbContext> o) : IDbContextFactory<CoreDbContext>
+        {
+            public CoreDbContext CreateDbContext() => new(o);
+        }
+
+        private static IDbContextFactory<CoreDbContext> Dbf() =>
+            new InMemoryFactory(new DbContextOptionsBuilder<CoreDbContext>()
+                .UseInMemoryDatabase(Guid.NewGuid().ToString()).Options);
+
         public TestWorker(TimeSpan? interval, Func<CancellationToken, Task> body)
-            : base(new LoggingService(),
+            : base(new LoggingService(), Dbf())
-                   new DatabaseService(new SettingsService(), new LoggingService()))
         {
             _interval = interval;
             _body     = body;