a183be7e6e
Two more maintenance-queue failures from the operator's 24h list: - vacuum_analyze died with "could not resize shared memory segment to 67MB: No space left on device" — Docker's default /dev/shm is 64MB, too small for VACUUM (ANALYZE)'s parallel-worker shared memory. Set the postgres service shm_size: 512m. - backup_db_task timed out at its 12-min limit once the DB grew; a pg_dump can't be chunked, so raise it to 30/35 min. (A long backup still briefly holds the concurrency-1 lane — the structural fix is a dedicated lane for long one-shots.) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>