feat(infra): add CasaOS compose with persistent /DATA bind

CasaOS copies imported compose files to /tmp/casaos-compose-app-* and
runs them from there, so the repo compose's relative ./data bind fails
at install ("bind source path does not exist") and would be wiped on
reboot. infra/compose.casaos.yaml mounts /DATA/AppData/dash instead and
carries x-casaos metadata for the app tile.

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

docker-compose.yml

@@ -9,5 +9,7 @@ services:
     ports:
       - "3000:3000"
     volumes:
+      # CasaOS: use infra/compose.casaos.yaml — CasaOS runs compose from /tmp,
+      # so this relative path fails there and would not survive a reboot.
       - ./data:/data
     restart: unless-stopped