- db.ts: getWebhooksByDid returns the 10 most recent subscriptions (ORDER BY id DESC LIMIT 10)
- jetstream.ts: fireWebhooks fans out to registered URLs via Promise.allSettled after each create/update/delete event
Jetstream was running backgrounded in the same container as the API server,
so crashes went undetected and Docker never restarted it. Now each process
runs as a separate docker-compose service with independent restart policies.
Also adds cursor persistence to SQLite (saved every 5s) so restarts resume
from where they left off, moves event destructuring inside try/catch blocks,
and adds global unhandled error/rejection handlers for crash visibility.
