Fix cluster master access

- Update global cluster_master instance for cross-module access
- Allows queue manager to access active jobs for cancellation
- Enables proper job_id logging in cancellation messages

vidai/cluster_master.py

@@ -1459,6 +1459,11 @@ def start_cluster_master(host: str = '0.0.0.0', port: int = 5003, shared_dir: st
     master.shared_dir = shared_dir
     master.weight = weight
     master.weight_explicit = weight_explicit
+
+    # Update the global instance for access from other modules
+    global cluster_master
+    cluster_master = master
+
     asyncio.run(master.start())