Prevent duplicate completion logs

- Only complete and log cancelled jobs that are still active
- Prevents duplicate completion messages for jobs already handled
- Cleaner logging for job cancellation

vidai/cluster_master.py

@@ -1409,6 +1409,7 @@ class ClusterMaster:
                         cancelled_jobs.append(job_id)
 
                 for job_id in cancelled_jobs:
+                    if job_id in self.active_jobs:
                         self.complete_job(job_id)
                         print(f"Completed cancelled job {job_id}")