Add cancellation logging

- cancel_job logs job cancellation to console
- Provides feedback when jobs are cancelled
- Clean, single log message per cancellation

vidai/queue.py

@@ -84,6 +84,8 @@ class QueueManager:
         # Update status to cancelled
         update_queue_status(queue_id, 'cancelled')
 
+        print(f"Job {queue_id} cancelled")
+
         return True
 
     def restart_job(self, queue_id: int, user_id: int = None) -> bool: