refactor: remove worker service, use Prefect Blocks for secrets

docker-compose.yml

@@ -70,23 +70,6 @@ services:
     command: prefect server services start
     restart: unless-stopped
 
-  # === PREFECT WORKER - PostgreSQL Backup ===
-  prefect-worker-pg-backup:
-    image: gitea.arnodo.fr/damien/prefect-worker-pg-backup:latest
-    container_name: prefect-worker-pg-backup
-    network_mode: service:tailscale
-    depends_on:
-      - prefect-server
-    environment:
-      # Prefect API connection (via Tailscale)
-      - PREFECT_API_URL=http://localhost:4200/api
-      # S3 credentials for Garage
-      - AWS_ACCESS_KEY_ID=${S3_ACCESS_KEY}
-      - AWS_SECRET_ACCESS_KEY=${S3_SECRET_KEY}
-      - AWS_ENDPOINT_URL=${S3_ENDPOINT_URL}
-    command: prefect worker start --pool pg-backup-pool --type process
-    restart: unless-stopped
-
 volumes:
   tailscale-state:
   redis-data: