After ProcessNewVideo the runner records transcript_status per outcome:
rate_limited (stamps the backoff clock), none, or fetched. Before fetching, a
video inside the TAPIR_FETCH_BACKOFF window is skipped (SkippedRateLimited) so a
just-429'd caption endpoint is not re-hit; once the window expires it retries.
Backoff/clock injected via variadic Options (WithBackoff, WithClock) so existing
New call sites and the fake-driven loop tests stay valid. Backoff 0 = always retry.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
mathiasandClaude Opus 4.8
40a614c8d4