feat: add Coolify volumes to Restic backup configuration

Add Coolify data and PostgreSQL volumes to daily backup schedule:
- dev_coolify_data - Coolify application data
- dev_coolify_postgres_data - Coolify database

Backup schedule: Daily at midnight (0 0 * * *)
Retention: 7 daily, 4 weekly, 6 monthly, 2 yearly

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

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

restic/compose.yaml

@@ -43,6 +43,8 @@ services:
       - backup_dev_gitea_data:/volumes/dev_gitea_data:ro
       - backup_dev_gitea_config:/volumes/dev_gitea_config:ro
       - backup_dev_gitea_runner_data:/volumes/dev_gitea_runner_data:ro
+      - backup_dev_coolify_data:/volumes/dev_coolify_data:ro
+      - backup_dev_coolify_postgres_data:/volumes/dev_coolify_postgres_data:ro
 
     environment:
       TZ: ${TIMEZONE:-Europe/Berlin}
@@ -166,6 +168,12 @@ volumes:
   backup_dev_gitea_runner_data:
     name: dev_gitea_runner_data
     external: true
+  backup_dev_coolify_data:
+    name: dev_coolify_data
+    external: true
+  backup_dev_coolify_postgres_data:
+    name: dev_coolify_postgres_data
+    external: true
 
 networks:
   compose_network: