docs(tonggan): bind AI discovery update causal chain

tonggan-bridge/receipts/TGB-20260727-001.json

@@ -0,0 +1,12 @@
+{
+  "schema": "guanghu.tonggan-bridge-receipt/v1",
+  "bridge_id": "TGB-20260727-001",
+  "state": "BLOCKED",
+  "diagnostic_code": "BOOTSTRAP_ACTION_NOT_DEPLOYED",
+  "deployment_result": "NOT_DEPLOYED",
+  "server_runtime_proven": false,
+  "public_route_proven": false,
+  "rollback_performed": false,
+  "next_step": "先通过已有主人邮件批准的固定管理动作部署并读回通感桥运行时；若该动作不存在，保持阻断，不恢复人类登录，不打开云后台冒充部署。",
+  "contains_secrets": false
+}