schema_migrations

{“what”:“Migration version number, typically a timestamp or sequence.”,“why”:“Uniquely identifies each migration; used to check if already applied.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T04:03:25.339274813+00:00”}

{“what”:“Timestamp when the migration was applied.”,“why”:“Shows when each migration ran; missing it leaves no audit trail.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T04:03:25.398602149+00:00”}