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.service

@@ -0,0 +1,22 @@
+[Unit]
+Description=Archipelago Kiosk (X11 + Chromium)
+After=archipelago.service graphical.target
+Wants=archipelago.service
+ConditionPathExists=/usr/local/bin/archipelago-kiosk-x11
+Conflicts=getty@tty1.service
+
+[Service]
+Type=simple
+User=archipelago
+Environment="HOME=/home/archipelago"
+Environment="DISPLAY=:0"
+# Wait for backend before launching UI
+ExecStartPre=/bin/bash -c 'for i in $(seq 1 30); do curl -sf http://localhost/health >/dev/null 2>&1 && exit 0; sleep 2; done; exit 0'
+ExecStart=/usr/bin/startx /usr/local/bin/archipelago-kiosk-x11 -- -nocursor vt1
+Restart=always
+RestartSec=5
+StandardInput=tty
+TTYPath=/dev/tty1
+
+[Install]
+WantedBy=multi-user.target