fix(backup-service): add mpc-service to allowed services

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/docker-compose.yml

@@ -199,7 +199,7 @@ services:
       - APP_PORT=3002
       - DATABASE_URL=postgresql://${POSTGRES_USER:-rwa_user}:${POSTGRES_PASSWORD:-rwa_secure_password}@postgres:5432/rwa_backup?schema=public
       - SERVICE_JWT_SECRET=${SERVICE_JWT_SECRET}
-      - ALLOWED_SERVICES=identity-service,recovery-service
+      - ALLOWED_SERVICES=identity-service,recovery-service,mpc-service
       - BACKUP_ENCRYPTION_KEY=${BACKUP_ENCRYPTION_KEY}
       - BACKUP_ENCRYPTION_KEY_ID=key-v1
       - MAX_RETRIEVE_PER_DAY=3