Fix realized pnl on backtest save + add tests (not all passing)

src/Managing.Application/Abstractions/ITradingBot.cs

@@ -21,9 +21,6 @@ namespace Managing.Application.Abstractions
 
         Task Run();
         Task StopBot(string reason = null);
-        int GetWinRate();
-        decimal GetProfitAndLoss();
-        decimal GetTotalFees();
         Task LoadAccount();
         Task LoadLastCandle();
         Task<LightSignal> CreateManualSignal(TradeDirection direction);