Supervisor S-0a/b: Entscheidungsjournal, Order-Events, SignalId, JSONL-Logs

Datenfundament fuer die KI-Analyse (docs/konzepte/KONZEPT-Modul-Supervisor.md, Phase S-0).
Sofortnutzen auch ohne KI: abfragbare Rejects, rekonstruierbare Order-Ketten.

- core_decision_journal (DecisionRecord): JEDE Handelsentscheidung strukturiert -
  Decision (Executed/Rejected/Skipped/Failed) + ReasonCode-Enum (als String, erweiterbar)
  + Kontext-JSON (kulturinvariant) + MarketSlug/EndDate (counterfactual-ready).
- core_order_events (OrderEventRecord): Order-Lifecycle als Daten (Placed/PlaceFailed/
  LadderStart/LadderStep/FloorReplaced/DustAbort ...) inkl. CLOB-Response.
- SignalId (GUID) auf CopySignal, durchgereicht bis ClosedTrade + Core-TradeRecord
  (Dual-Write) und in die Leiter (ExitLadderState.SignalId) -> Dossier-Korrelation.
- CopyTradingEngine: ~20 Entscheidungs-Sites journalisieren zusaetzlich zum Freitext-Log
  (Mode/SellOnly/H3/MaxBuyPrice/PerMaster/TimeLimit/Budget/Balance/Minimum/SpamBlock/
  Leiter/Ownership/NotFound/Teilverkauf/Inkonsistenz/Grace/Demo-Fill/-Close/Live-BUY).
- SellLadderService: Order-Events fuer Start/Step/Floor-Replace/Dust; IOrderEventLog injiziert.
- TerminalLogger: JSONL-Sink (eine Datei/Tag, LogJson pur) + CorrelationId-Support. Dual-Sink.
- Journal-Writes fehlertolerant (brechen den Geld-Pfad nie).
- Migrationen offline generiert UND angewendet (rein additiv): Core (Widen F1 + Journal),
  CopyTrading (SignalId), RF (Initial) - DB war bis AddMarketTakerFeeBps migriert, verifiziert.
- Launcher-Designer: Account-Spalten-Instanziierung wiederhergestellt (war bei Designer-
  Reserialisierung verloren gegangen -> NullReference im Smoke).

Tests: +5 (LogJson, Journal-Roundtrips, SignalId) + Journal-Assertions in Engine-Tests.
Build 0 Fehler, 336 Tests gruen, --smoke-ui komplett gruen (alle Views inkl. RF gegen echte Tabellen).

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

tests/PolyTrader.Tests/CopyTradingEngineTests.cs

@@ -27,6 +27,7 @@ namespace PolyTrader.Tests
             public CopyTradingState Copy = null!;
             public FakeClobClient Clob = null!;
             public ChannelReader<ClosedTrade> ClosedReader = null!;
+            public FakeDecisionJournal Journal = null!;
         }
 
         private static Harness Build()
@@ -40,18 +41,20 @@ namespace PolyTrader.Tests
             var marketRepo = new FakeMarketRepository();
             var accountRepo = new FakeAccountRepository();
             var threema = new ThreemaService(logger, new JobManager());
-            var ladder = new SellLadderService(copy, state, clob, logger, threema, posRepo);
+            var journal = new FakeDecisionJournal();
+            var orderEvents = new FakeOrderEventLog();
+            var ladder = new SellLadderService(copy, state, clob, logger, threema, posRepo, orderEvents);
 
             var signalCh = Channel.CreateUnbounded<CopySignal>();
             var closedCh = Channel.CreateUnbounded<ClosedTrade>();
 
             var engine = new CopyTradingEngine(state, copy, signalCh.Reader, closedCh.Writer, logger,
-                clob, api, posRepo, marketRepo, accountRepo, ladder);
+                clob, api, posRepo, marketRepo, accountRepo, ladder, journal, orderEvents);
 
             // MarketData cachen, damit der API-Pfad (Cache-Miss) nie läuft.
             state.MarketCache[Tok] = new MarketData { Slug = "slug", Question = "Frage?", Category = "Politics", TakerFeeBps = 0, NegRisk = false };
 
-            return new Harness { Engine = engine, State = state, Copy = copy, Clob = clob, ClosedReader = closedCh.Reader };
+            return new Harness { Engine = engine, State = state, Copy = copy, Clob = clob, ClosedReader = closedCh.Reader, Journal = journal };
         }
 
         private static AccountState Account(bool demo) => new()
@@ -88,6 +91,9 @@ namespace PolyTrader.Tests
 
             Assert.Empty(h.Clob.Placed);          // kein Zukauf während des Ausstiegs
             Assert.True(acc.OpenPositions[Tok].ExitPending);
+            // S-0: Entscheidung strukturiert im Journal (nicht nur Freitext-Log).
+            Assert.Contains(h.Journal.Written, d =>
+                d.Decision == TradeDecision.Skipped && d.Reason == DecisionReason.ExitPendingBuySkip && d.TokenId == Tok);
         }
 
         // ---------- Doppel-SELL-Guard ----------
@@ -120,6 +126,9 @@ namespace PolyTrader.Tests
             Assert.False(acc.OpenPositions.ContainsKey(Tok));      // Demo-Position geschlossen
             Assert.True(h.ClosedReader.TryRead(out var ct));       // ClosedTrade geschrieben
             Assert.Equal(Tok, ct!.TokenId);
+            Assert.False(string.IsNullOrEmpty(ct.SignalId));       // S-0: Korrelation gesetzt
+            Assert.Contains(h.Journal.Written, d =>
+                d.Decision == TradeDecision.Executed && d.Reason == DecisionReason.SystemResolutionClose);
         }
 
         [Fact]