Add netpnl and initialBalance to backtests

src/Managing.Domain/Backtests/Backtest.cs

@@ -55,6 +55,8 @@ public class Backtest
     public Guid RequestId { get; set; }
     public object? Metadata { get; set; }
     public string ScoreMessage { get; set; } = string.Empty;
+    [Required] public decimal InitialBalance { get; set; }
+    [Required] public decimal NetPnl { get; set; }
 
     /// <summary>
     /// Creates a new TradingBotConfig based on this backtest's configuration for starting a live bot.