Add cancellation token support to backtest execution and update progress handling

src/Managing.Application/GeneticService.cs

@@ -1057,7 +1057,9 @@ public class TradingBotFitness : IFitness
                         requestId: _request.RequestId,
                         bundleRequestId: null, // Genetic algorithm doesn't use bundle requests
                         metadata: new GeneticBacktestMetadata(_geneticAlgorithm?.GenerationsNumber ?? 0,
-                            _request.RequestId)
+                            _request.RequestId),
+                        progressCallback: null,
+                        cancellationToken: default
                     )
                 ).GetAwaiter().GetResult();
             }