== where is grimmory's backup unit after the remove?
/mnt/sys_drive/felhom-data/backups/secondary/grimmory

GET /api/backup/snapshots?stack=grimmory -> 200 {'ok': True, 'data': []}
control, an app removed by its walk earlier (dawarich) -> 200 {'ok': True, 'data': []}
controller log around the remove:
2026/10/01 17:12:39 update.go:853: [INFO] [stacks] update grimmory: safety dump done (1 file(s)) [/mnt/felhom-drives/scratch_hdd/userdata/grimmory/backups/primary/grimmory/db-dumps/pre-restore-20261001T171239Z-grimmory-mariadb.sql]
2026/10/01 17:13:05 manager.go:434: [INFO] [stacks] userdata belt: drive /mnt/felhom-drives/scratch_hdd/userdata/grimmory not mounted — skipping ensure (held by drive gate)
2026/10/01 17:13:47 image_retention.go:222: [INFO] [stacks] image retention (update of grimmory): pass over 14 image(s) of [ghcr.io/grimmory-tools/grimmory mariadb] — 0 candidate(s), 0 deleted, the rest kept
2026/10/01 17:14:09 router.go:961: [INFO] [api] Remove requested for stack: grimmory
2026/10/01 17:14:09 delete.go:604: [INFO] Removing deployed stack: grimmory (removeHDDData=false, hddDeclared=true, backupPaths=0)
2026/10/01 17:14:09 [INFO] [stacks] ParseComposeHDDMounts: found 1 HDD mounts for /opt/docker/stacks/grimmory/docker-compose.yml
2026/10/01 17:14:36 delete.go:662: [INFO] [stacks] RemoveStack grimmory: removed volume(s) [grimmory_grimmory_db]
2026/10/01 17:14:36 delete.go:761: [INFO] Stack grimmory removed successfully (took 26.8s)
2026/10/01 17:14:36 image_retention.go:249: [INFO] [stacks] image retention (remove of grimmory): deleted [ghcr.io/grimmory-tools/grimmory:v3.4.1] (2d22fed942c6, 481MB) — no container, installed app or undo names it (decision 53)
2026/10/01 17:14:36 image_retention.go:249: [INFO] [stacks] image retention (remove of grimmory): deleted [mariadb:11.4] (417af2374091, 327MB) — no container, installed app or undo names it (decision 53)
2026/10/01 17:14:37 image_retention.go:249: [INFO] [stacks] image retention (remove of grimmory): deleted [ghcr.io/grimmory-tools/grimmory:v3.5.0] (6843304e9a1b, 481MB) — no container, installed app or undo names it (decision 53)
2026/10/01 17:14:37 image_retention.go:222: [INFO] [stacks] image retention (remove of grimmory): pass over 14 image(s) of [ghcr.io/grimmory-tools/grimmory mariadb] — 3 candidate(s), 3 deleted, the rest kept

restore page mentions grimmory: False | radicale (control, removed + restored earlier): False
