- swarm/test_swarm_api, swarm/test_heartbeat: replace deprecated
asyncio.get_event_loop().run_until_complete() with asyncio.run();
the former raises in 3.11 once another test has set+closed a loop on
the main thread.
- prober/test_prober_bus, prober/test_prober_worker: extend tcp_fingerprint
mocks with tos/dscp/ecn/server_isn so the worker doesn't KeyError into
the prober_error branch.
- services/test_service_isolation: collector now retries on event-stream
errors instead of exiting; assert it stays running and cancel cleanly.
- live/test_imap_live, live/test_pop3_live: log format emits
outcome="failure", not "failed".
- live/test_service_isolation_live: is_service_container accepts label
OR state-name; rewrite the empty-state test against a synthetic
unlabeled container instead of the host's real fleet.