Add delete backtests by filters

src/Managing.Application/Backtests/Backtester.cs

@@ -416,6 +416,19 @@ namespace Managing.Application.Backtests
             }
         }
 
+        public async Task<int> DeleteBacktestsByFiltersAsync(User user, BacktestsFilter filter)
+        {
+            try
+            {
+                return await _backtestRepository.DeleteBacktestsByFiltersAsync(user, filter);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Failed to delete backtests by filters for user {UserId}", user.Id);
+                throw;
+            }
+        }
+
         public (IEnumerable<LightBacktest> Backtests, int TotalCount) GetBacktestsByUserPaginated(
             User user,
             int page,