chore: add standard STATUS markers to worker streams and optimize test polling

This fixes the 'stuck' behavior in concurrent tests by ensuring the tests look for standard completion markers and don't wait for unnecessary timeouts.

src/multi_agent_conductor.py

@@ -599,8 +599,12 @@ def run_worker_lifecycle(ticket: Ticket, context: WorkerContext, context_files:
   engine._dirty = True
  if "BLOCKED" in response.upper():
   ticket.mark_blocked(response)
+  if event_queue:
+   _queue_put(event_queue, "response", {"text": f"\n\n[STATUS] BLOCKED: {response}", "stream_id": f"Tier 3 (Worker): {ticket.id}", "status": "done"})
  else:
   ticket.mark_complete()
+  if event_queue:
+   _queue_put(event_queue, "response", {"text": "\n\n[STATUS] COMPLETED", "stream_id": f"Tier 3 (Worker): {ticket.id}", "status": "done"})
  
  if event_queue:
   _queue_put(event_queue, "ticket_completed", {"ticket_id": ticket.id, "timestamp": time.time()})