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/Dockerfile

@@ -0,0 +1,16 @@
+# GPS 标注助手：H5 采集 GPS + 编辑 targets.csv（构建上下文为 central-server）
+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY apps/topology-editor/package.json ./
+RUN npm install --production
+
+COPY apps/topology-editor/server.js ./
+COPY apps/topology-editor/public ./public
+
+ENV PORT=4080
+EXPOSE 4080
+
+# 运行时由 docker-compose 挂载 edge-agent/config 到 /config，并设置 CONFIG_DIR=/config
+CMD ["node", "server.js"]