A second review found five gaps. A loop that closed between is_running() and submission stranded the trial in flight; fallback sends (no running main loop) settled every trial as inconclusive; a timed-out send that kept running passed the guard during a later trial, because the context flag was a bare True; the viewer clear checked the outage generation, released the lock, then cleared, so it could clear a newer outage; and the health loop ran the metadata sync, with its database retries, on the event loop.
Trials now carry an id: _admit_measured_send returns it, _as_offline_trial sets it in the context, and is_radio_offline and the settle methods only honor the trial currently in flight. The scheduler's two wrappers share _run_measured_send, which submits inside its error handling (closing the coroutine if submission fails), settles a fallback trial by its real outcome, and settles any trial left open in a finally. _clear_radio_offline_state takes an expected generation and checks it under the state lock. The health loop checks the 30 s throttle on the loop and runs the sync itself in a worker thread. The delayed-write test now waits for the newer outage to trip before releasing the stalled writer, so it fails without publish serialization.