chore: 更新 wrangler 可观测性配置

Update wrangler.jsonc

Author: VirgilClyne

wrangler.jsonc

@@ -4,5 +4,20 @@
   "compatibility_date": "2025-11-21",
   "compatibility_flags": [
     "nodejs_compat"
-  ]
+  ],
+  "observability": {
+    "enabled": false,
+    "head_sampling_rate": 1,
+    "logs": {
+      "enabled": true,
+      "head_sampling_rate": 1,
+      "persist": true,
+      "invocation_logs": true
+    },
+    "traces": {
+      "enabled": true,
+      "persist": true,
+      "head_sampling_rate": 1
+    }
+  }
 }