docker-compose only health-checked db. Add:
- web: an unauthenticated GET /api/health (excluded from the auth middleware) +
a compose healthcheck that hits it (node global fetch — no curl/wget in image).
- worker: a background daemon thread touches /tmp/worker.alive every ~15s
(independent of the main loop, so it stays fresh through a long download) +
a compose healthcheck on the file's mtime (unhealthy if >90s stale).
Now `docker compose ps` reports real health for all services.
worker 223 tests, web 154, tsc + build + compose config clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jonathan
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