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/blackbox/config.yml

@@ -0,0 +1,33 @@
+modules:
+  icmp:
+    prober: icmp
+    timeout: 5s
+    icmp:
+      preferred_ip_protocol: "ip4"
+  tcp_connect:
+    prober: tcp
+    timeout: 5s
+  http_2xx:
+    prober: http
+    timeout: 5s
+    http:
+      valid_http_versions: ["HTTP/1.1", "HTTP/2.0"]
+      valid_status_codes: [200]
+      method: GET
+  http_post_2xx:
+    prober: http
+    timeout: 5s
+    http:
+      valid_http_versions: ["HTTP/1.1", "HTTP/2.0"]
+      valid_status_codes: [200]
+      method: POST
+      headers:
+        Content-Type: application/json
+      body: '{}'
+  tcp_connect_tls:
+    prober: tcp
+    timeout: 5s
+    tcp:
+      tls: true
+      tls_config:
+        insecure_skip_verify: false