refactor: config/apps 目录重组、文档重构、架构图收窄

- 中央：config/(prometheus,alertmanager,grafana)、apps/(tile-cache,topology-editor)
- 边缘：config/(vmagent,blackbox,targets)、apps/(onvif-exporter)
- env: TRAEFIK_PROVIDER、prometheus/env.example 详细说明
- 文档：README/doc 重构，EDGE_CACHE 合并到 EDGE_AGENT_CONFIG
- targets.csv 更新流程说明，ARCHITECTURE 图收窄

Made-with: Cursor

central-server/config/prometheus/prometheus.yml.template

@@ -0,0 +1,67 @@
+# Prometheus 中央服务器配置模板
+# ============================================
+# 说明：
+#   - 本文件为配置模板，包含 ${变量名} 占位符
+#   - 部署时由 deploy.sh 从 .env 读取变量，用 envsubst 生成 prometheus.yml
+#   - 请勿直接编辑 prometheus.yml，修改应在此模板或 .env 中进行
+#
+# 变量来源：central-server/.env（参考 env.example）；本文件位于 config/prometheus/
+# 涉及变量：PROMETHEUS_SCRAPE_INTERVAL, PROMETHEUS_EVALUATION_INTERVAL,
+#          PROMETHEUS_CLUSTER_NAME, VICTORIAMETRICS_PORT,
+#          PROMETHEUS_REMOTE_WRITE_MAX_SAMPLES, PROMETHEUS_REMOTE_WRITE_CAPACITY,
+#          PROMETHEUS_REMOTE_WRITE_MAX_SHARDS
+# ============================================
+
+global:
+  scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
+  evaluation_interval: ${PROMETHEUS_EVALUATION_INTERVAL}s
+  external_labels:
+    cluster: '${PROMETHEUS_CLUSTER_NAME}'
+
+# 远程写入：将中央 Prometheus 抓取到的本地服务指标推送到 VictoriaMetrics
+# （边缘节点由 vmagent 直接 remote_write 到 VictoriaMetrics）
+remote_write:
+  - url: http://victoria-metrics:${VICTORIAMETRICS_PORT}/api/v1/write
+    queue_config:
+      max_samples_per_send: ${PROMETHEUS_REMOTE_WRITE_MAX_SAMPLES}
+      capacity: ${PROMETHEUS_REMOTE_WRITE_CAPACITY}
+      max_shards: ${PROMETHEUS_REMOTE_WRITE_MAX_SHARDS}
+
+# 抓取配置：仅抓取中央本机 Docker 容器（Prometheus/VM/Alertmanager/Grafana）
+scrape_configs:
+  # 抓取中央Prometheus自身
+  - job_name: 'prometheus-central'
+    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
+    static_configs:
+      - targets: ['prometheus-central:9090']
+
+  # 抓取VictoriaMetrics (VictoriaMetrics 提供 /metrics 端点)
+  - job_name: 'victoria-metrics'
+    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
+    metrics_path: '/metrics'
+    static_configs:
+      - targets: ['victoria-metrics:${VICTORIAMETRICS_PORT}']
+
+  # 抓取Alertmanager
+  - job_name: 'alertmanager'
+    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
+    static_configs:
+      - targets: ['alertmanager:9093']
+
+  # 抓取Grafana (需要启用 metrics 功能)
+  - job_name: 'grafana'
+    scrape_interval: ${PROMETHEUS_SCRAPE_INTERVAL}s
+    metrics_path: '/metrics'
+    static_configs:
+      - targets: ['grafana:3000']
+
+# 告警规则：alert_rules.yml 与 prometheus.yml 同目录
+rule_files:
+  - "alert_rules.yml"
+
+# Alertmanager：告警路由与静默
+alerting:
+  alertmanagers:
+    - static_configs:
+        - targets:
+          - alertmanager:9093