pg backup latency issues

some alerts happened again in pgbackrest:

2025-01-15 19:34:42 -ALERTOR1:#tor-alerts- PgBackRestStaleBackups [firing] PostgreSQL backups are stale on weather-01.torproject.org
2025-01-15 21:14:42 -ALERTOR1:#tor-alerts- PgBackRestStaleBackups [resolved] PostgreSQL backups are stale on weather-01.torproject.org
2025-01-15 23:15:42 -ALERTOR1:#tor-alerts- PgBackRestStaleBackups [firing] PostgreSQL backups are stale on weather-01.torproject.org