feat(server): 可观测性 Phase 1 — 健康检查路由 + Prometheus 指标 + 连接池/事件积压监控
- 添加 /health/live 存活探针别名(原 /health + /health/ready 保留) - 新增 metrics middleware:http_requests_total 计数器 + http_request_duration_seconds 直方图 - Prometheus exporter 独立端口 9090(可通过 ERP__SERVER__METRICS_PORT 覆盖) - 后台任务每 30s 采样 DB 连接池活跃/空闲连接数(pg_stat_activity) - 后台任务每 30s 采样 EventBus pending 事件积压数 - UUID 路径归一化避免高基数(/api/v1/users/:id/posts)
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@@ -119,3 +119,7 @@ handlebars = "6"
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# HTML sanitization
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ammonia = "4"
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# Metrics
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metrics = "0.24"
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metrics-exporter-prometheus = "0.16"
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