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/apps/topology-editor/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "topology-editor",
+  "version": "0.1.0",
+  "description": "拓扑标注助手：上传/下载 targets.csv，H5 采集 GPS 与地图校验。可与 central-server 或 edge-agent 同机运行。",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.19.2",
+    "multer": "^1.4.5-lts.1"
+  }
+}