Add cancellation token support to backtest execution and update progress handling

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)
             {