Fix Docker permissions check: replace 'groups' with 'id' command

- Synology NAS doesn't have 'groups' command
- Use 'id' command instead which is available on all Unix systems
- This fixes the deployment pipeline error

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.github/workflows/deploy.yml

@@ -54,7 +54,7 @@ jobs:
       - name: Check Docker permissions
         run: |
           ssh -p ${{ secrets.NAS_PORT }} admin@${{ secrets.NAS_HOST }} \
-            "ls -la /var/run/docker.sock && groups"
+            "ls -la /var/run/docker.sock && id"
 
       - name: Remote docker-compose up
         run: |