The SSD on turing3 (/mnt/ssd) is shared by Postgres, Plex's SQLite DB
and the media library. When it fills, Postgres crashes (cannot write
postmaster.pid) and Plex's library DB corrupts. Add a CronJob that
checks df via the plex-data mount every 15m and warns Telegram at >=90%
used (3h cooldown). Bot token/chatId live in the out-of-band
`telegram-disk-alert` Secret, not in git.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
gilgamezh