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.

apps/bot/src/env.ts

@@ -12,6 +12,8 @@ const EnvSchema = z.object({
   LOG_LEVEL: z.string().default('info'),
   DEFAULT_LOCALE: z.enum(['de', 'en']).default('de'),
   BACKUP_RETENTION_DAYS: z.coerce.number().int().positive().default(14),
+  BACKUP_CRON: z.string().default('0 3 * * *'),
+  BACKUP_DIR: z.string().default('/backups'),
   METRICS_TOKEN: z.string().optional(),
   HEALTH_PORT: z.coerce.number().int().positive().default(8080)
 });