feat: add prompt-first batches and pausable task guidance

tests/unit/admin_console/test_task_queue_service.py

@@ -987,6 +987,7 @@ async def test_manual_stop_of_one_run_does_not_pollute_concurrent_run():
     on different devices: device A's task is stopped manually, device B's task
     then finishes normally and must still be reported as completed.
     """
+    state.is_shutting_down = False
     ended_payloads: dict[str, dict] = {}
 
     def capture(event_type, data):