Fix backtest delete and save

src/Managing.Infrastructure.Database/BacktestRepository.cs

@@ -47,11 +47,11 @@ public class BacktestRepository : IBacktestRepository
 
     public void DeleteBacktestByIdForUser(User user, string id)
     {
-        var backtest = _backtestRepository.FindById(id);
+        var backtest = _backtestRepository.FindOne(b => b.Identifier == id);
 
         if (backtest != null && backtest.User != null && backtest.User.Name == user.Name)
         {
-            _backtestRepository.DeleteById(id);
+            _backtestRepository.DeleteById(backtest.Id.ToString());
         }
     }
 

src/Managing.Infrastructure.Database/MongoDb/Collections/BacktestDto.cs

@@ -22,5 +22,6 @@ namespace Managing.Infrastructure.Databases.MongoDb.Collections
         public UserDto User { get; set; }
         public PerformanceMetrics Statistics { get; set; }
         public double Score { get; set; }
+        public string Identifier { get; set; }
     }
 }

src/Managing.Infrastructure.Database/MongoDb/MongoMappers.cs

@@ -14,7 +14,6 @@ using Managing.Domain.Users;
 using Managing.Domain.Workers;
 using Managing.Domain.Workflows.Synthetics;
 using Managing.Infrastructure.Databases.MongoDb.Collections;
-using MongoDB.Bson;
 using static Managing.Common.Enums;
 
 namespace Managing.Infrastructure.Databases.MongoDb;
@@ -145,7 +144,7 @@ public static class MongoMappers
             WinRate = b.WinRate,
             GrowthPercentage = b.GrowthPercentage,
             HodlPercentage = b.HodlPercentage,
-            Id = b.Id.ToString(),
+            Id = b.Identifier,
             OptimizedMoneyManagement = Map(b.OptimizedMoneyManagement),
             User = Map(b.User),
             Statistics = b.Statistics,
@@ -164,7 +163,7 @@ public static class MongoMappers
 
         return new BacktestDto
         {
-            Id = (!string.IsNullOrEmpty(result.Id)) ? ObjectId.Parse(result.Id) : ObjectId.GenerateNewId(),
+            Identifier = result.Id,
             FinalPnl = result.FinalPnl,
             WinRate = result.WinRate,
             GrowthPercentage = result.GrowthPercentage,