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P1 of the retry audit, from the report's "reliability and diagnosis" batch. - Media downloads no longer share the 30s *total* timeout of metadata fetches. The size caps allowed 10 MiB (reupload fallback) and 512 MiB (ugoira frame zip) while the clock allowed 30s, so a slow link made those posts impossible: `MEDIA_CLIENT` has no total timeout and instead bounds the response head and every chunk with a 30s *idle* window, which keeps the stalled-connection protection. Verified against a local probe: the old policy aborts a 40s download at 30.0s, the new one completes it (2 MiB, 40.1s), and a body that stops delivering still fails after exactly 30s. - A finished row's write-back is no longer best-effort. `delete_row` failing left the row `in_progress` with a live lease, so the next sweep flipped it back to `pending` and re-ran a completed task — a second album, a second prompt, a second channel copy. Both terminal writes are now retried, and a delete that still fails falls back to a `done` tombstone that neither the lease query nor the sweep looks at; reschedule (no safe tombstone: marking it done would drop the retry silently) logs what the sweep will do. - bsky and pixiv no longer present a *failed* video conversion as a post with no media: the remux/ugoira error propagates (pixiv keeps its retry class, bsky reports Transient), so the user sees the real cause and `fetch` gets its retries. bsky's "no ffmpeg" case stays a degradation — retrying a deployment gap cannot help. - pixiv's token exchange checks the HTTP status before parsing the body, so a 429/5xx from the OAuth endpoint stays retryable instead of becoming a permanent Api/Json error (via the shared `pixiv_error_is_retryable`), and startup validation only disables pixiv for a rejected credential — one 503 while the container came up used to turn every later pixiv link into "pixiv support is disabled".