Add PositionCount property to Backtest models and responses

- Introduced PositionCount to Backtest, LightBacktest, and their respective response models.
- Updated BacktestController and BacktestExecutor to include PositionCount in responses.
- Modified database schema to accommodate new PositionCount field in relevant entities.

src/Managing.Api/Controllers/BacktestController.cs

@@ -316,7 +316,8 @@ public class BacktestController : BaseController
                 Score = b.Score,
                 ScoreMessage = b.ScoreMessage,
                 InitialBalance = b.InitialBalance,
-                NetPnl = b.NetPnl
+                NetPnl = b.NetPnl,
+                PositionCount = b.PositionCount
             }),
             TotalCount = totalCount,
             CurrentPage = page,
@@ -457,7 +458,8 @@ public class BacktestController : BaseController
                 Score = b.Score,
                 ScoreMessage = b.ScoreMessage,
                 InitialBalance = b.InitialBalance,
-                NetPnl = b.NetPnl
+                NetPnl = b.NetPnl,
+                PositionCount = b.PositionCount
             }),
             TotalCount = totalCount,
             CurrentPage = page,

src/Managing.Api/Models/Requests/LightBacktestResponse.cs

@@ -22,6 +22,7 @@ public class LightBacktestResponse
     [Required] public string ScoreMessage { get; set; } = string.Empty;
     [Required] public decimal InitialBalance { get; set; }
     [Required] public decimal NetPnl { get; set; }
+    [Required] public int PositionCount { get; set; }
 }
 
 public static class LightBacktestResponseMapper
@@ -45,7 +46,8 @@ public static class LightBacktestResponseMapper
             Score = b.Score,
             ScoreMessage = b.ScoreMessage,
             InitialBalance = b.InitialBalance,
-            NetPnl = b.NetPnl
+            NetPnl = b.NetPnl,
+            PositionCount = b.PositionCount
         };
     }
 }

src/Managing.Application/Backtests/BacktestExecutor.cs

@@ -410,6 +410,7 @@ public class BacktestExecutor
             EndDate = candles.LastOrDefault()!.OpenTime,
             InitialBalance = initialBalance,
             NetPnl = netPnl, // Net PnL after fees
+            PositionCount = tradingBot.Positions.Count,
         };
 
         if (save && user != null)
@@ -526,7 +527,8 @@ public class BacktestExecutor
             Score = backtest.Score,
             ScoreMessage = backtest.ScoreMessage,
             InitialBalance = backtest.InitialBalance,
-            NetPnl = backtest.NetPnl
+            NetPnl = backtest.NetPnl,
+            PositionCount = backtest.PositionCount
         };
     }
 

src/Managing.Domain/Backtests/Backtest.cs

@@ -41,6 +41,7 @@ public class Backtest
     public string ScoreMessage { get; set; } = string.Empty;
     [Required] public decimal InitialBalance { get; set; }
     [Required] public decimal NetPnl { get; set; }
+    [Required] public int PositionCount { get; set; }
 
     /// <summary>
     /// Creates a new TradingBotConfig based on this backtest's configuration for starting a live bot.

src/Managing.Domain/Backtests/LightBacktest.cs

@@ -27,4 +27,5 @@ public class LightBacktest
     [Id(14)] public string Ticker { get; set; } = string.Empty;
     [Id(15)] public decimal InitialBalance { get; set; }
     [Id(16)] public decimal NetPnl { get; set; }
+    [Id(17)] public int PositionCount { get; set; }
 } 

src/Managing.Infrastructure.Database/Migrations/20251118131323_AddPositionCountToBacktests.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Managing.Infrastructure.Databases.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddPositionCountToBacktests : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "PositionCount",
+                table: "Backtests",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "PositionCount",
+                table: "Backtests");
+        }
+    }
+}

src/Managing.Infrastructure.Database/Migrations/ManagingDbContextModelSnapshot.cs

@@ -217,6 +217,9 @@ namespace Managing.Infrastructure.Databases.Migrations
                     b.Property<decimal>("NetPnl")
                         .HasColumnType("decimal(18,8)");
 
+                    b.Property<int>("PositionCount")
+                        .HasColumnType("integer");
+
                     b.Property<string>("PositionsJson")
                         .IsRequired()
                         .HasColumnType("jsonb");

src/Managing.Infrastructure.Database/PostgreSql/Entities/BacktestEntity.cs

@@ -128,4 +128,7 @@ public class BacktestEntity
     [Required]
     [Column(TypeName = "decimal(18,8)")]
     public decimal NetPnl { get; set; }
+
+    [Required]
+    public int PositionCount { get; set; }
 }