@

Phase 3: Trading-Kern (Risk, Execution, Portfolio) mit sicherem Broker-Default

- Core/Trading/TradingModels: Signal, Order(Request/Result), RiskContext/Decision,
  Account, Position, Quote, ExecutionResult, Enums (Side/OrderType/Mode)
- IBrokerClient + NullBrokerClient (sicherer Default, handelt NIE bis IBKR-Adapter verifiziert)
- RiskService (+IRiskService): Sizing nach MaxTrade%, Modul-Limit, Slippage; Buy/Sell
- PortfolioService (+IPortfolioService): core_position + core_trade_history + core_budget
- ExecutionService (+IExecutionService): Signal -> Kurs -> Konto -> Risiko -> Order -> Buchung
- TradingSettings in AppSettings (Paper/Live, TradingEnabled, Risikoparameter)
- CoreMigrations: core_position; DI-Registrierung der Trading-Services
- Tests: RiskService (11) + ExecutionService (6, NSubstitute) -> 38/38 gruen

Offen (bewusst gekapselt): echter IbkrBrokerClient gegen Client-Portal-Gateway (manuell verifizieren).

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

Core/Database/Migrations/CoreMigrations.cs

@@ -24,6 +24,7 @@ public class CoreMigrations
         await CreateCoreWorkerLogAsync();
         await CreateCoreTradeHistoryAsync();
         await CreateCoreBudgetAsync();
+        await CreateCorePositionAsync();
         _logger.Info("Core", "Core-Migrationen abgeschlossen.");
     }
 
@@ -76,4 +77,15 @@ public class CoreMigrations
             `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;");
 }