feat: 接入 Prometheus 监控（放行 /actuator/prometheus + 指标暴露 + compose 编排）

docker-compose.yml

@@ -145,7 +145,34 @@ services:
       start_period: 40s
       retries: 3
 
+  # ─────────── 监控 ───────────
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: fruitshorts-prometheus
+    restart: unless-stopped
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - prometheus-data:/prometheus
+    command:
+      - "--config.file=/etc/prometheus/prometheus.yml"
+
+  grafana:
+    image: grafana/grafana:latest
+    container_name: fruitshorts-grafana
+    restart: unless-stopped
+    ports:
+      - "3000:3000"
+    volumes:
+      - grafana-data:/var/lib/grafana
+    environment:
+      - GF_SECURITY_ADMIN_USER=admin
+      - GF_SECURITY_ADMIN_PASSWORD=admin
+
 volumes:
   # 命名卷：跟着 compose 项目走，`docker compose down -v` 才会删
   db-data:
   redis-data:
+  prometheus-data:
+  grafana-data: