Settings > Backups gains a whole-data archive beside the database
snapshots, and both lists now fully work from the page.
- Data archives: `write-data-backup-archive.ts` tars all of DATA_DIR into
BACKUP_ARCHIVE_DIR as cobble-data-<epoch-ms>.tar.gz, every entry under one
root folder named after the archive, writing a .part name and renaming on
success so a cut-off run is never listed. The newest
AppData.DataBackupsKept are kept; db/.backups is left as it is.
- Restore: `restore-data-backup.ts` extracts to a temp dir, requires one
root folder holding a db folder, takes a safety archive first, then
replaces DATA_DIR (the database snapshots included) and `restart-app.ts`
restarts the process through the docker socket, since the open SQLite
handle points at the replaced file.
- Upload and restore: a modal over each list (database file or data
archive), replacing the old /admin/settings/backups/restore page.
- Delete for both kinds, icon-only row actions shared through
RowIconButton, and restore on every row.
- One backup or restore of either kind at a time (with-backup-run-lock).
- BACKUP_ARCHIVE_DIR is a start-up path (ProcessOnlyEnvKeys); the installer
mounts $COBBLE_HOME/backups-archives at /backups-archives and recreates a
container that lacks it. The image installs tar and gzip.
