Add backup functionality with escalation rules for moderation commands

- Updated .env.example to include backup configuration options.
- Modified docker-compose.yml to mount backup volume.
- Enhanced Dockerfile to install PostgreSQL client.
- Added EscalationRule model to Prisma schema for managing warning escalation.
- Updated environment validation in env.ts to include backup settings.
- Refactored job handling in jobs.ts to implement backup jobs and cleanup.
- Introduced escalation commands in moderation service for managing user warnings.
- Updated moderation commands to apply escalation rules based on warning count.

docker-compose.yml

@@ -34,6 +34,8 @@ services:
         condition: service_healthy
       redis:
         condition: service_healthy
+    volumes:
+      - backups:/backups
 
   webui:
     image: node:22-alpine