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

edge-agent/config/vmagent/vmagent-scrape.yml.template

@@ -0,0 +1,40 @@
+# vmagent 抓取配置（与 prometheus.yml 兼容，自监控端口改为 8429）
+# 如需修改 region，可编辑此文件或通过 deploy.sh 从 vmagent-scrape.yml.template 生成
+global:
+  scrape_interval: 120s
+  evaluation_interval: 120s
+  external_labels:
+    region: workernode_1
+
+scrape_configs:
+  - job_name: 'onvif-devices'
+    scrape_interval: 120s
+    file_sd_configs:
+      - files: ['/etc/prometheus/target-onvif.json']
+        refresh_interval: 5m
+    metrics_path: /metrics
+    static_configs:
+      - targets: ['onvif-exporter:9600']
+
+  - job_name: 'network-ping'
+    scrape_interval: 300s
+    file_sd_configs:
+      - files: ['/etc/prometheus/target-ping.json']
+        refresh_interval: 5m
+    metrics_path: /probe
+    params:
+      module: [icmp]
+    static_configs:
+      - targets: ['blackbox-exporter:9115']
+    relabel_configs:
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - target_label: __address__
+        replacement: blackbox-exporter:9115
+
+  - job_name: 'vmagent-edge'
+    scrape_interval: 60s
+    static_configs:
+      - targets: ['localhost:8429']