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

doc/TROUBLESHOOTING.md

@@ -116,10 +116,10 @@ docker compose logs prometheus-edge
 # 查询: probe_success{job="network-ping"}
 
 # 2. 检查告警规则文件
-cat central-server/alert_rules.yml
+cat central-server/config/prometheus/alert_rules.yml
 
 # 3. 检查 Prometheus 配置
-cat central-server/prometheus.yml
+cat central-server/config/prometheus/prometheus.yml
 ```
 
 **常见原因**：
@@ -130,7 +130,7 @@ cat central-server/prometheus.yml
 **解决方案**：
 - 部署边缘节点并配置监控目标
 - 检查告警规则表达式
-- 确认 `prometheus.yml` 中引用了 `alert_rules.yml`
+- 确认 `config/prometheus/prometheus.yml` 中引用了 `alert_rules.yml`
 - 重启 Prometheus 容器
 
 ---
@@ -374,7 +374,7 @@ ls -lh /storage/prometheus-data
 ls -lh /storage/victoria-metrics-data
 
 # 检查数据保留配置
-grep retention prometheus.yml
+grep retention config/prometheus/prometheus.yml
 ```
 
 **解决**：