julian
f4b806a538
The reviewer host's collector.sqlite was created by an earlier build, before the `kind` column. CREATE TABLE IF NOT EXISTS shapes only a new database, so every query naming the column failed: the collector's /health (container unhealthy), every booth ingest, and the trainer's readiness — whose stdlib server printed the traceback and dropped the socket, which the collector could only render as "trainer not reachable: fetch failed". Nine days like that. - CollectorDb.#migrate(): PRAGMA table_info against the list of columns added since the first deploy; ALTER TABLE ADD COLUMN for each missing one (all nullable or defaulted). Append to that list whenever a column joins the CREATE. Test replays the original schema: health, ingest, stats, a legacy row reads back with the defaults. - Trainer Handler._guarded(): any unexpected exception → 500 JSON naming it, never a dropped connection; /health keeps answering. Test drives readiness against an old-schema DB. - The collector's training status proxy includes the trainer's error text. Wiki: the incident and the schema rule (vision-review-outbox), what the message means (bodytype-classifier-training), log. Deploy: the new collector migrates on start; nothing manual. Claude-Session: https://claude.ai/code/session_01FWncR69HgGPuei1dLrW3cU