Archive the whole data volume in Backups, not just the database

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.

src/pages/admin/settings/backups/(functions)/grab-backups-server-props.ts

@@ -1,5 +1,6 @@
 import grabSuperAdminUser from "@/src/functions/backend/backups/grab-super-admin-user";
 import grabDbBackups from "@/src/functions/backend/backups/grab-db-backups";
+import grabDataBackups from "@/src/functions/backend/backups/grab-data-backups";
 import { SettingsDefaultPath } from "@/src/dict/settings-pages-dict";
 import type { PagePropsType } from "@/src/types";
 import type { BunextPageServerFn } from "@moduletrace/bunext/types";
@@ -9,8 +10,8 @@ type Params = Parameters<BunextPageServerFn<PagePropsType>>[0];
 
 /**
  * Shared server props for the `/admin/settings/backups` sub-pages: the
- * saved snapshots. Super admins only; everyone else lands on the general
- * settings.
+ * saved database snapshots and the whole-data archives. Super admins
+ * only; everyone else lands on the general settings.
  */
 export default async function grabBackupsServerProps(params: Params) {
     const settings = await grabSettingsServerProps(params);
@@ -30,6 +31,7 @@ export default async function grabBackupsServerProps(params: Params) {
         props: {
             ...settings.props,
             backups: grabDbBackups(),
+            data_backups: grabDataBackups(),
         },
     };
 }