feat(services): add services_repo_force and compact refresh output

Force-reset repo clones on the automatic TTL refresh when enabled. Report refresh changes as one +/~/-/!TAG line per repo.

docs/dev/rest-api/endpoints.md

@@ -781,7 +781,7 @@ git-pull every service repository configured under `directories.services`. `refr
     {
       "refreshed": true,
       "repos": [
-        { "spec": "github.com/example/services", "updated": true, "changes": ["a1b2c3d Update EXAMPLE"] }
+        { "spec": "github.com/example/services", "updated": true, "changes": ["~EXAMPLE"] }
       ]
     }
     ```

docs/reference/configuration/directories.md

@@ -67,6 +67,15 @@ directories:
     `unshackle util refresh-services` command instead **hard-resets** the clone to upstream,
     discarding any local edits.
 
+    Set `services_repo_force: true` to make the automatic 24 h refresh behave like
+    `refresh-services`. When a refresh is due, the run fetches and hard-resets every clone,
+    and discards any local edits in `_repos/`. Runs between refreshes do not touch the
+    network. Use it on unattended hosts where nobody edits the clones by hand.
+
+    ```yaml
+    services_repo_force: true
+    ```
+
 !!! warning "Read-only installs and reinstalls"
     If the services directory lives inside the installed package, a reinstall can delete the
     `_repos` clones. They are re-cloned on next use. On **read-only installs** you must

docs/reference/configuration/index.md

@@ -29,7 +29,7 @@ Where the file lives, how unshackle discovers it, and how to edit it:
 
 | Area | Keys |
 |------|------|
-| [Directories](directories.md) | `directories`, `filenames` |
+| [Directories](directories.md) | `directories`, `filenames`, `services_repo_force` |
 | [Services & authentication](services.md) | `services`, `credentials`, `firefox_cookies`, `remote_services`, `serve` |
 | [Download & processing](download.md) | `dl`, `continue_downloads`, `subtitle`, `audio`, `muxing`, `language_tags`, `dual_multi_mode` |
 | [Output & naming](output.md) | `output_template`, `tag`, `tag_rules`, `tag_group_name`, `tag_imdb_tmdb`, `chapter_fallback_name`, `unicode_filenames` |