R8: Accounting- + Supervisor-Modul + Core-Datenfundament (S-0)

Portierung der beiden fehlenden Grundbausteine aus PolytraderSharp (voller Ausbau).

Core S-0 (Datenfundament fuer Analyse/Forensik):
- core_decision_journal + core_order_events (+ ReasonCode/Decision/OrderEvent-Enums),
  IDecisionJournal/IOrderEventLog mit fehlertoleranten EF-Impls (Handel bricht nie).
- SignalId-Durchreichung TradeSignal -> ExecutionService -> core_trade_history;
  ExecutionService schreibt an jeder Verzweigung Journal/Order-Events.
- JSONL-Log-Sink (LogJson + Dual-Sink), pure Analytik: RealizedPnlEngine (FIFO),
  TradeAnalytics, DossierBuilder. Migration AddAnalysisFoundation.

Accounting-Modul (acc_): unabhaengiger IBKR-Kontoauszug (Activity Flex Query) hinter
Interfaces mit Offline-Null-Stubs -> append-only Ledger + Periodenabrechnung/BWA + FX
(USD/EUR) + CSV/PDF (PDFsharp/MigraDoc). Steuerschicht bewusst offen (Platzhalter-Tab).
Kein Handel. Migration InitialAccounting.

Supervisor-Modul (sup_): read-only OpenRouter-Agent (Function-Calling-Loop) + read-only
Tool-Registry (8 Tools) + Profile + Dossier-Browser + Counterfactual-Job (Stub) +
Tagesbericht/MCP-Light (opt-in). Migration InitialSupervisor.

Verdrahtung: Program.cs (beide Module + Icons), slnx/App/Tests-Referenzen,
provision-db.ps1, AppSettings-Sektionen, docs/konzepte, README.

Tests: 79 -> 117 gruen (FIFO/KPIs/Dossier/JSONL, Classifier/Engine/FX/Idempotenz,
OpenRouter/Registry/Agent/MCP, STA-Konstruktion beider neuen Fenster).

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

src/IBKRTrader.Core/Logging/LoggingService.cs

@@ -11,7 +11,8 @@ public class LoggingService
 {
     private RichTextBox? _rtb;
     private AppLogLevel  _minLevel = AppLogLevel.Info;
-    private readonly object _fileLock = new();
+    private readonly object _fileLock  = new();
+    private readonly object _jsonlLock = new();
 
     private static readonly string LogBaseDir =
         Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Logs");
@@ -33,11 +34,23 @@ public class LoggingService
     public void Error(string module, string message, Exception? ex = null)
         => Write(AppLogLevel.Error, module, message, ex);
 
-    public void Write(AppLogLevel level, string module, string message, Exception? ex = null)
+    // Überladungen mit CorrelationId (SignalId) – schreiben zusätzlich strukturiert ins JSONL,
+    // sodass der Supervisor die komplette Kette „alles zu diesem Signal" filtern kann.
+    public void Info (string module, string message, string? cid, Exception? ex = null)
+        => Write(AppLogLevel.Info,  module, message, ex, cid);
+
+    public void Warn (string module, string message, string? cid, Exception? ex = null)
+        => Write(AppLogLevel.Warn,  module, message, ex, cid);
+
+    public void Error(string module, string message, string? cid, Exception? ex = null)
+        => Write(AppLogLevel.Error, module, message, ex, cid);
+
+    public void Write(AppLogLevel level, string module, string message, Exception? ex = null, string? cid = null)
     {
         if (level < _minLevel) return;
         var entry = new LogEntry(DateTime.Now, level, module, message, ex);
         WriteToFile(entry);
+        WriteToJsonl(entry, cid);
         WriteToRtb(entry);
     }
 
@@ -61,6 +74,27 @@ public class LoggingService
         catch { /* Logging darf niemals abstürzen */ }
     }
 
+    // ─── JSONL (KI-freundlicher Zweit-Sink) ─────────────────────────────────────
+
+    /// <summary>
+    /// Schreibt zusätzlich eine JSON-Zeile nach Logs\{yyyy-MM-dd}.jsonl (Dual-Sink). Zeilenweise
+    /// filter-/parsebar (Datum/Level/Quelle/Text/CorrelationId) – Grundlage für Log Viewer + Supervisor.
+    /// </summary>
+    private void WriteToJsonl(LogEntry e, string? cid)
+    {
+        try
+        {
+            Directory.CreateDirectory(LogBaseDir);
+            var file = Path.Combine(LogBaseDir, $"{e.Timestamp:yyyy-MM-dd}.jsonl");
+            var message = e.Exception != null ? $"{e.Message} | {e.Exception.Message}" : e.Message;
+            var json = LogJson.WriteLine(e.Timestamp, e.Level, e.Module, message, cid);
+
+            lock (_jsonlLock)
+                File.AppendAllText(file, json + "\n");
+        }
+        catch { /* Logging darf niemals abstürzen */ }
+    }
+
     // ─── RichTextBox ──────────────────────────────────────────────────────────
 
     private static readonly Color ColorInfo  = Color.FromArgb(150, 210, 150);