Update wrangler observability config with detailed log settings

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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

wrangler.jsonc

@@ -27,6 +27,18 @@
     }
   ],
   "observability": {
-    "enabled": true
+    "enabled": false,
+    "head_sampling_rate": 1,
+    "logs": {
+      "enabled": true,
+      "head_sampling_rate": 1,
+      "persist": true,
+      "invocation_logs": true
+    },
+    "traces": {
+      "enabled": false,
+      "persist": true,
+      "head_sampling_rate": 1
+    }
   }
 }