Add async for saving backtests

src/Managing.Application.Abstractions/Repositories/IBacktestRepository.cs

@@ -8,6 +8,7 @@ namespace Managing.Application.Abstractions.Repositories;
 public interface IBacktestRepository
 {
     void InsertBacktestForUser(User user, Backtest result);
+    Task InsertBacktestForUserAsync(User user, Backtest result);
     IEnumerable<Backtest> GetBacktestsByUser(User user);
     Task<IEnumerable<Backtest>> GetBacktestsByUserAsync(User user);
     IEnumerable<Backtest> GetBacktestsByRequestId(Guid requestId);

src/Managing.Application/Bots/Grains/BacktestTradingBotGrain.cs

@@ -79,6 +79,7 @@ public class BacktestTradingBotGrain : Grain, IBacktestTradingBotGrain
         // Initialize wallet balance with first candle
         tradingBot.WalletBalances.Clear();
         tradingBot.WalletBalances.Add(candles.FirstOrDefault()!.Date, config.BotTradingBalance);
+        var initialBalance = config.BotTradingBalance;
 
         var fixedCandles = new HashSet<Candle>();
         // Process all candles following the exact pattern from GetBacktestingResult
@@ -166,13 +167,13 @@ public class BacktestTradingBotGrain : Grain, IBacktestTradingBotGrain
             Metadata = metadata,
             StartDate = candles.FirstOrDefault()!.OpenTime,
             EndDate = candles.LastOrDefault()!.OpenTime,
-            InitialBalance = tradingBot.WalletBalances.FirstOrDefault().Value,
+            InitialBalance = initialBalance,
             NetPnl = finalPnl - fees,
         };
 
         if (save && user != null)
         {
-            _backtestRepository.InsertBacktestForUser(user, result);
+            await _backtestRepository.InsertBacktestForUserAsync(user, result);
         }
 
         // Send notification if backtest meets criteria

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

@@ -32,6 +32,16 @@ public class PostgreSqlBacktestRepository : IBacktestRepository
         _context.SaveChanges();
     }
 
+    public async Task InsertBacktestForUserAsync(User user, Backtest result)
+    {
+        ValidateBacktestData(result);
+        result.User = user;
+        
+        var entity = PostgreSqlMappers.Map(result);
+        _context.Backtests.Add(entity);
+        await _context.SaveChangesAsync();
+    }
+
     /// <summary>
     /// Validates that all numeric fields in the backtest are of the correct type
     /// </summary>