Fix global PNL

src/Managing.Infrastructure.Database/PostgreSql/PostgreSqlTradingRepository.cs

@@ -505,6 +505,28 @@ public class PostgreSqlTradingRepository : ITradingRepository
         return PostgreSqlMappers.Map(positions);
     }
 
+    public async Task<decimal> GetGlobalPnLFromPositionsAsync()
+    {
+        try
+        {
+            await PostgreSqlConnectionHelper.EnsureConnectionOpenAsync(_context);
+            
+            // Calculate total PnL from all finished positions (closed positions)
+            // Only include positions that are Finished or Flipped (closed positions)
+            var totalPnL = await _context.Positions
+                .AsNoTracking()
+                .Where(p => p.Status == PositionStatus.Finished || p.Status == PositionStatus.Flipped)
+                .SumAsync(p => p.ProfitAndLoss)
+                .ConfigureAwait(false);
+
+            return totalPnL;
+        }
+        finally
+        {
+            await PostgreSqlConnectionHelper.SafeCloseConnectionAsync(_context);
+        }
+    }
+
     #endregion
 
     #region Signal Methods