Fix job restart to set status to processing

- Restarted jobs now set to 'processing' with empty job_id
- Cluster master will pick up restarted jobs for assignment

vidai/queue.py

@@ -95,8 +95,8 @@ class QueueManager:
         if job['status'] != 'cancelled':
             return False
 
-        # Reset retry_count and update status to queued
-        update_queue_status(queue_id, 'queued', retry_count=0)
+        # Reset retry_count and update status to processing (so cluster master picks it up)
+        update_queue_status(queue_id, 'processing', retry_count=0, job_id='')
 
         return True