Lifecycle queued -> transcribing -> done|failed, per-row serving endpoint,
segments JSONB round trip, owner-only get/write (not-found, not forbidden),
list without transcript text, and the start-up sweep that fails unfinished
rows as `interrupted` for every user (audio is not retained, so no resume).
Red: CreateUpload and friends are undefined.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
