* feat(relay): alert on relay cell table lock convoys
Adds a log-based metric and alert for cell-inventory lock holds of at
least 1,000 ms, and a Cloud SQL log metric and alert for relay-only lock
timeout cancels at 20 or more per minute. NOWAIT refusals are excluded:
background sweeps produce about 160 per minute even with rehome paused.
Replayed over 2026-09-20 14:00 to 2026-09-22 15:00 UTC: the hold filter
matches all 93 asia-east2 rehome holds plus 9 director holds, and every
one of the 88 cancel burst minutes overlaps an asia-east2 hold.
Claude-Session: ced32ebb-7155-4413-adad-1eccd14c2010
* fix(relay): page only on cell lock holds; director holds stay visible
Director holds of 1-2.5 s recur several times a day with rehoming paused,
and pausing rehome does not stop them. The paging hold policy now selects
role=cell samples only; a separate policy with no notification channel
keeps director holds visible. The burst documentation no longer claims no
burst happens while paused, and the runbook points a burst with no cell
hold at the director policy.
Replayed cell-only: 93 of 93 asia-east2 holds, 0 director holds over
2026-09-20 14:00 to 2026-09-22 15:00 UTC; 0 from then to 2026-09-23 07:30.
Claude-Session: ced32ebb-7155-4413-adad-1eccd14c2010
Jinwoo Hong
a2a78ab335