=== PHASE 3 setup: calibre-web lives on hdd_1 (a separate 1 TB device; Docker is NOT on it) ===
--- live app state BEFORE ---
container: calibre-web Up 5 minutes (healthy)
  userdata files: 22
  userdata bytes: 5952219	/mnt/felhom-drives/hdd_1/userdata
  userdata TREE fingerprint: 5a9b2db75dfd4ba4131adb3255670472

--- prepare a FULL off-site scratch for calibre-web and record its size ---
  scratch bytes (this is what the reconstitute must fit): 5808789	/mnt/felhom-drives/hdd_1/backups/offsite-restore/calibre-web
  marker: {"schema":1,"snapshot_id":"ece64c87","full":true,"finished_at":"2026-08-31T21:05:22Z"}
--- free space now ---
  avail: 949296586752