Add cancellation token support to backtest execution and update progress handling

src/Managing.Application/Backtests/BacktestExecutor.cs

@@ -125,6 +125,7 @@ public class BacktestExecutor
     /// <param name="bundleRequestId">Optional bundle request ID to update with backtest result</param>
     /// <param name="metadata">Additional metadata</param>
     /// <param name="progressCallback">Optional callback for progress updates (0-100)</param>
+    /// <param name="cancellationToken">Cancellation token to stop execution</param>
     /// <returns>The lightweight backtest result</returns>
     public async Task<LightBacktest> ExecuteAsync(
         TradingBotConfig config,
@@ -135,7 +136,8 @@ public class BacktestExecutor
         string requestId = null,
         Guid? bundleRequestId = null,
         object metadata = null,
-        Func<int, Task> progressCallback = null)
+        Func<int, Task> progressCallback = null,
+        CancellationToken cancellationToken = default)
     {
         if (candles == null || candles.Count == 0)
         {
@@ -247,6 +249,9 @@ public class BacktestExecutor
         // Process all candles with optimized rolling window approach
         foreach (var candle in orderedCandles)
         {
+            // Check for cancellation (timeout or shutdown)
+            cancellationToken.ThrowIfCancellationRequested();
+
             // Add to HashSet for reuse
             fixedCandles.Add(candle);
             tradingBot.LastCandle = candle;

src/Managing.Application/Backtests/BacktestExecutorAdapter.cs

@@ -65,7 +65,8 @@ public class BacktestExecutorAdapter : IBacktester
             requestId,
             bundleRequestId: null,
             metadata,
-            progressCallback: null);
+            progressCallback: null,
+            cancellationToken: default);
 
         return result;
     }
@@ -88,7 +89,8 @@ public class BacktestExecutorAdapter : IBacktester
             requestId,
             bundleRequestId: null,
             metadata,
-            progressCallback: null);
+            progressCallback: null,
+            cancellationToken: default);
 
         return result;
     }

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();
             }

src/Managing.Application/Workers/BacktestComputeWorker.cs

@@ -267,18 +267,9 @@ public class BacktestComputeWorker : BackgroundService
             _jobProgressTrackers.TryAdd(job.Id, progressTracker);
 
             // Progress callback that only updates in-memory progress (non-blocking)
+            // Timeout is now enforced via CancellationToken, not by throwing in callback
             Func<int, Task> progressCallback = (percentage) =>
             {
-                // Check if job has been running too long
-                var elapsed = DateTime.UtcNow - jobStartTime;
-                if (elapsed.TotalMinutes > _options.JobTimeoutMinutes)
-                {
-                    _logger.LogWarning(
-                        "Job {JobId} has been running for {ElapsedMinutes} minutes, exceeding timeout of {TimeoutMinutes} minutes",
-                        job.Id, elapsed.TotalMinutes, _options.JobTimeoutMinutes);
-                    throw new TimeoutException($"Job exceeded timeout of {_options.JobTimeoutMinutes} minutes");
-                }
-
                 // Update progress in memory only - persistence happens in background
                 progressTracker.UpdateProgress(percentage);
 
@@ -301,7 +292,8 @@ public class BacktestComputeWorker : BackgroundService
                     requestId: job.RequestId,
                     bundleRequestId: job.BundleRequestId,
                     metadata: null,
-                    progressCallback: progressCallback);
+                    progressCallback: progressCallback,
+                    cancellationToken: linkedCts.Token);
             }
             catch (OperationCanceledException) when (timeoutCts.Token.IsCancellationRequested && !cancellationToken.IsCancellationRequested)
             {