1. Fix async deadlock in test_action_status_async_wait:
  - Root cause: Test used worker_threads=1 while spawning a server
    task and immediately blocking on status_watch.changed().await
  - With only 1 worker thread, the spawned task cannot run while
    main is blocked → deadlock → 60s timeout

2. Reduce test_sync_publish_same_context duration:
  - Callback used 10s sleep to simulate slow processing
  - With 3 messages: 3 * 10s = 30+ seconds
  - Reduced to 100ms sleep - still validates non-blocking publish
    behavior but 100x faster (~0.3s instead of 30s)