The existing daily cleanup never effectively ran: it was an interval
job counted from container start (reset on every deploy), it called
asyncio.get_event_loop() from a worker thread, and even when deleting,
SQLite never returns freed pages to the filesystem. Live DB: 4.1 GB,
of which 2.6 GB log and 0.6 GB unused pages.
New maintenance service, scheduled daily at MAINTENANCE_HOUR_UTC:30
and once 5 minutes after every start:
- delete log entries older than LOG_RETENTION_DAYS (30) and keep at
most LOG_MAX_ENTRIES (200k) newest ones
- delete processed_mails markers of deleted rules/accounts (FKs are
not enforced by SQLite)
- VACUUM when >25% of the file is unused, only if free disk space
covers the copy; never runs twice in parallel
GET/POST /api/logs/maintenance expose status and a manual run; the log
menu shows DB size, entry count and last run, with "Datenbank
aufräumen & verkleinern". Removed the dead cleanup_old_logs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
