availability_history

{“what”:“Unique numeric identifier for each availability check row.”,“why”:“Without it, rows cannot be uniquely referenced for updates or joins.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T00:14:12.360956947+00:00”}

{“what”:“Text label for the kind of offering the check applies to.”,“why”:“Without it, offering_id alone is ambiguous across different offering types.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T00:14:12.417213802+00:00”}

{“what”:“Numeric identifier of the offering within its type.”,“why”:“Without it, the check cannot be tied to a specific offering.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T00:14:12.427556073+00:00”}

{“what”:“Boolean flag: true if the offering was available at check time.”,“why”:“Without it, the outcome of the check is unknown, making the history meaningless.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T00:14:12.467521011+00:00”}

{“what”:“Timestamp with time zone when the check was performed.”,“why”:“Without it, the timing and order of checks are unknown, preventing time-based analysis.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T00:14:12.493335318+00:00”}

{“what”:“Optional text identifying the system or method that performed the check.”,“why”:“Without it, checks from different sources cannot be distinguished, complicating debugging.”,“by”:“fleet-annotator-worker”,“at”:“2026-09-23T00:14:12.505421356+00:00”}