The Skipper/Admiral atomic deploy/update path used to create
.sencho-backup/ inside the user's stack folder, which silently failed
with EACCES whenever a container had chowned the bind mount (swag,
tautulli, linuxserver/* images, etc). That broke auto-rollback and the
manual rollback endpoint for those stacks. Stack backups now live under
<DATA_DIR>/backups/<stackName>/ next to sencho.db, which is always
writable by the Sencho user.
While stress-testing the same scenario, MonitorService also flooded the
error log with "Error parsing stats for container ... 404 no such
container" because per-container stats polls (30s tick) raced with
docker compose recreating containers. The 404 case is now skipped
silently; non-404 stats failures still log at error level.
Anso