Add Gitea bundle recovery script

ops/borg-ui/scripts/README.md

@@ -5,6 +5,7 @@ These scripts are intended to run on the Unraid host before a Borg backup starts
 ## Current script
 
 - `pre-backup-dumps.sh`
+- `gitea-bundle-mirror.sh`
 
 ## Output
 
@@ -12,7 +13,13 @@ Fresh dump artifacts are written to:
 
 - `/mnt/user/backups/borg/dumps/latest`
 
+Fresh Gitea repository bundles are written to:
+
+- `/mnt/user/backups/git-bundles/gitea`
+
 Borg UI should include `/local/borg-dumps` as a backup source.
+The Gitea bundle target should also be part of the Borg scope, either through
+the backups share or an explicit Borg source.
 
 The dump set also includes `unraid-flash-config.tar.gz`, a host-generated
 archive of `/boot/config` plus checksum and manifest. Treat this archive as
@@ -21,6 +28,8 @@ secret backup material.
 ## Notes
 
 - The script is written for host execution where `docker` is available.
+- `gitea-bundle-mirror.sh` additionally expects host access to the Gitea bare
+  repositories under `/mnt/user/services/gitea/git/repositories`.
 - It does not assume Backrest.
 - It keeps only the latest dump set because Borg itself provides history.