BackupService tracked last-success/last-error as plain in-process fields
and scheduled the daily backup via setInterval measured from process
start — so any server restart (deploy/crash/OOM/reboot, routine under
`restart: always`) silently reset the admin UI to "last successful
backup: Never" and drifted the actual cadence, independent of whether
backups were writing correctly to disk (they were — a real field
incident at park-buzi showed 7 valid rotating backups on disk with the
status stuck on "Never").
Persist last-success/error to new site_config columns (migration 0025)
and add BackupService.isDue(), computed from the persisted timestamp
instead of process uptime; server.ts now polls every 15 min and lets
isDue() gate the actual run. No API/UI contract change.
Claude-Session: https://claude.ai/code/session_01FWncR69HgGPuei1dLrW3cU
julian
2910672b5a