refactor: update dependencies and remove unused code

- Added new dependencies: `adler2`, `crc32fast`, `flate2`, `miniz_oxide`, and `libredox`.
- Updated existing dependencies: `tokio-rustls` to version 0.26.4 and `filetime` to version 0.2.27.
- Removed the `backup.rs` file as it is no longer needed.
- Introduced tests for configuration and credential management.
- Enhanced the `identity` module to generate W3C compliant DID documents.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

image-recipe/configs/archipelago-kiosk-watchdog.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Archipelago Kiosk Watchdog
+After=archipelago.service
+Wants=archipelago.service
+
+[Service]
+Type=simple
+User=root
+ExecStart=/usr/local/bin/archipelago-kiosk-watchdog
+Restart=always
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target