chore: checkpoint pre-execute-bead 20260604T040006-0423693b

Author: ddx-checkpoint

.ddx/metrics/locks.jsonl

@@ -8589,3 +8589,6 @@
 {"event":"release","lock_name":"tracker.lock","operation":"tracker.commit","holder_pid":3636388,"acquired_at":"2026-06-04T03:25:37.302051334Z","released_at":"2026-06-04T03:25:37.351401812Z","duration_ms":49}
 {"event":"acquire","lock_name":"tracker.lock","operation":"tracker.commit","holder_pid":3636388,"acquired_at":"2026-06-04T03:30:50.906715154Z"}
 {"event":"release","lock_name":"tracker.lock","operation":"tracker.commit","holder_pid":3636388,"acquired_at":"2026-06-04T03:30:50.906715154Z","released_at":"2026-06-04T03:31:17.388441147Z","duration_ms":26481}
+{"event":"acquire","lock_name":"tracker.lock","operation":"tracker.commit","holder_pid":3827329,"acquired_at":"2026-06-04T03:53:16.736633992Z"}
+{"event":"release","lock_name":"tracker.lock","operation":"tracker.commit","holder_pid":3827329,"acquired_at":"2026-06-04T03:53:16.736633992Z","released_at":"2026-06-04T03:53:16.789227475Z","duration_ms":52}
+{"event":"acquire","lock_name":"tracker.lock","operation":"tracker.commit","holder_pid":3827329,"acquired_at":"2026-06-04T04:00:06.686033175Z"}