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R1: Umbau auf Multi-Projekt-Struktur (Vorbild PolytraderSharp)

Kurskorrektur: Vorbild ist PolytraderSharp (C#), nicht die veraltete Python-Version.
Reiner Strukturumbau, Verhalten unveraendert.

- src/IBKRTrader.Core (classlib): Core-Code + UI-Contract (ModuleFormBase, WindowManager)
- src/IBKRTrader.Modules.CongressTrading (classlib, referenziert nur Core)
- Root: IBKRTrader.App (WinExe) referenziert Core + Modul
- tests/IBKRTrader.Tests: Referenzen auf Core + Modul
- Neue .slnx; ungenutztes HtmlAgilityPack entfernt
- docs/ARCHITECTURE.md: korrigierter Ziel-Stand + R-Phasenplan
- Build + 38/38 Tests gruen; App startet

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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src/IBKRTrader.Core/Workers/WorkerEngine.cs

@@ -0,0 +1,96 @@
+using System.Collections.Concurrent;
+using System.ComponentModel;
+using IBKRTrader.Core.Logging;
+
+namespace IBKRTrader.Core.Workers;
+
+/// <summary>
+/// Orchestriert alle registrierten IWorker.
+/// – Startet/stoppt Worker
+/// – Stellt BindingList für DataGridView bereit
+/// – Thread-sicher via ConcurrentDictionary
+/// </summary>
+public class WorkerEngine
+{
+    private readonly IEnumerable<IWorker>                   _workers;
+    private readonly LoggingService                         _logger;
+    private readonly ConcurrentDictionary<string, IWorker>  _registry = new();
+    private CancellationTokenSource                         _cts      = new();
+
+    /// <summary>Live-bindbare Liste für dgv_workerlist.</summary>
+    public BindingList<WorkerInfo> WorkerInfos { get; } = [];
+
+    public WorkerEngine(IEnumerable<IWorker> workers, LoggingService logger)
+    {
+        _workers = workers;
+        _logger  = logger;
+    }
+
+    // ─── Engine-Lifecycle ─────────────────────────────────────────────────────
+
+    public async Task StartAllAsync()
+    {
+        _cts = new CancellationTokenSource();
+
+        foreach (var worker in _workers)
+        {
+            RegisterWorker(worker);
+
+            if (worker.Info.Active)
+                await worker.StartAsync(_cts.Token);
+        }
+
+        _logger.Info("Core", $"WorkerEngine gestartet – {_registry.Count} Worker/Services registriert.");
+    }
+
+    public async Task StopAllAsync()
+    {
+        await _cts.CancelAsync();
+
+        var tasks = _registry.Values.Select(w => w.StopAsync());
+        await Task.WhenAll(tasks);
+
+        _logger.Info("Core", "WorkerEngine gestoppt.");
+    }
+
+    // ─── Einzelsteuerung ──────────────────────────────────────────────────────
+
+    public async Task StartWorkerAsync(string name)
+    {
+        if (!_registry.TryGetValue(name, out var worker)) return;
+        worker.Info.Active = true;
+        await worker.StartAsync(_cts.Token);
+        _logger.Info("Core", $"Worker manuell gestartet: {name}");
+    }
+
+    public async Task StopWorkerAsync(string name)
+    {
+        if (!_registry.TryGetValue(name, out var worker)) return;
+        worker.Info.Active = false;
+        await worker.StopAsync();
+        _logger.Info("Core", $"Worker manuell gestoppt: {name}");
+    }
+
+    public async Task TriggerWorkerAsync(string name)
+    {
+        if (!_registry.TryGetValue(name, out var worker)) return;
+        await worker.TriggerAsync();
+        _logger.Info("Core", $"Worker manuell ausgelöst: {name}");
+    }
+
+    // ─── Intern ───────────────────────────────────────────────────────────────
+
+    private void RegisterWorker(IWorker worker)
+    {
+        _registry[worker.Name] = worker;
+
+        // WorkerInfo in BindingList eintragen (UI-Thread, falls nötig)
+        if (WorkerInfos is { } list)
+        {
+            if (SynchronizationContext.Current != null)
+                list.Add(worker.Info);
+            else
+                list.Add(worker.Info);
+        }
+    }
+}