feat(docker): PostgreSQL 每日自动备份

- 新增 backup.sh: pg_dump + gzip，自动清理过期备份
- production compose 添加 backup 服务: cron 每日 02:00 执行
- 可通过 BACKUP_CRON / BACKUP_KEEP_DAYS 环境变量自定义

docker/docker-compose.production.yml

@@ -0,0 +1,79 @@
+# 生产环境 Docker Compose 配置
+# 使用方式: docker compose -f docker/docker-compose.yml -f docker/docker-compose.production.yml up -d
+
+services:
+  app:
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    container_name: hms-server
+    restart: unless-stopped
+    ports:
+      - "${APP_PORT:-3000}:3000"
+      - "${METRICS_PORT:-9090}:9090"
+    env_file:
+      - .env.production
+    environment:
+      ERP__DATABASE__URL: postgres://${POSTGRES_USER:-erp}:${POSTGRES_PASSWORD}@postgres:${POSTGRES_PORT:-5432}/${POSTGRES_DB:-erp}
+      ERP__REDIS__URL: redis://:${REDIS_PASSWORD}@redis:${REDIS_PORT:-6379}
+    volumes:
+      - app-uploads:/app/uploads
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000/api/v1/health"]
+      interval: 30s
+      timeout: 5s
+      start_period: 60s
+      retries: 3
+    deploy:
+      resources:
+        limits:
+          cpus: "2"
+          memory: 1024M
+        reservations:
+          cpus: "0.5"
+          memory: 256M
+    networks:
+      - hms-internal
+
+  # 每日自动备份 — 每天凌晨 02:00 执行 pg_dump，保留 7 天
+  # 手动触发: docker compose -f docker/docker-compose.yml -f docker/docker-compose.production.yml run --rm backup
+  backup:
+    image: postgres:16-alpine
+    container_name: hms-backup
+    restart: unless-stopped
+    entrypoint: >
+      sh -c "
+        echo '$$BACKUP_CRON /usr/local/bin/backup.sh' > /etc/crontabs/root &&
+        crond -f -l 2
+      "
+    environment:
+      PGHOST: postgres
+      PGPORT: "${POSTGRES_PORT:-5432}"
+      PGUSER: "${POSTGRES_USER:-erp}"
+      PGDATABASE: "${POSTGRES_DB:-erp}"
+      BACKUP_DIR: /backups
+      KEEP_DAYS: "${BACKUP_KEEP_DAYS:-7}"
+      BACKUP_CRON: "${BACKUP_CRON:-0 2 * * *}"
+    volumes:
+      - ./backup.sh:/usr/local/bin/backup.sh:ro
+      - backup_data:/backups
+    depends_on:
+      postgres:
+        condition: service_healthy
+    networks:
+      - hms-internal
+
+volumes:
+  app-uploads:
+    driver: local
+  backup_data:
+    driver: local
+
+networks:
+  hms-internal:
+    driver: bridge