Deploys (docker SIGTERM→SIGKILL, default 10s) were killing Celery jobs
mid-flight. Give in-flight work room to drain and make interrupted work
resume cleanly instead of stalling.
- docker-compose.yml: stop_grace_period per lane (web 30s / worker 90s /
scheduler 60s / maintenance-long 180s / ml-worker 120s) so warm shutdown
can actually drain before SIGKILL.
- celery_app.py: task_reject_on_worker_lost=True — a task killed past the
grace window is re-queued (safe: idempotent + chunked, recovery sweeps
re-drive stragglers).
- interpreter_client.py: map 429/5xx (502/503/504) → InterpreterUnavailable
and parse Retry-After (delta-seconds or HTTP-date); a draining Interpreter
behind a reverse proxy no longer raises an opaque HTTPError.
- translation.py: thread retry_after out of _translate_batch; retranslate_posts
resumes after the Retry-After hint (or 60s default, capped 900s) on an
interrupt with _reset_done=True, self-terminating via the health gate.
- tests: 429/5xx mapping + Retry-After parse; interrupt-resume + default backoff.
No migration.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
services/interpreter_client.py: sync (requests) client for the LibreTranslate-
compatible /v1/translate — no new dep, mirrors the platform clients. translate()
maps translatedText[]↔texts (order + length), returns detected_lang +
engine_version (aggregate = first item, fine for a per-post [title, description]
batch); passthrough items come back unchanged in their slot. InterpreterUnavailable
on 503 / connection error (retry later), InterpreterBadRequest on 400. health()
checks /v1/health engines.llm. 10 unit tests with mocked HTTP.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM
bvandeusen