Add safety check notification and error handling (#19055)

Adds a new app-server notification that fires when a user account has
been flagged for potential safety reasons.

codex-rs/app-server-protocol/schema/json/ServerNotification.json

@@ -480,6 +480,7 @@
             "contextWindowExceeded",
             "usageLimitExceeded",
             "serverOverloaded",
+            "cyberPolicy",
             "internalServerError",
             "unauthorized",
             "badRequest",
@@ -2260,6 +2261,34 @@
       ],
       "type": "object"
     },
+    "ModelVerification": {
+      "enum": [
+        "trustedAccessForCyber"
+      ],
+      "type": "string"
+    },
+    "ModelVerificationNotification": {
+      "properties": {
+        "threadId": {
+          "type": "string"
+        },
+        "turnId": {
+          "type": "string"
+        },
+        "verifications": {
+          "items": {
+            "$ref": "#/definitions/ModelVerification"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "threadId",
+        "turnId",
+        "verifications"
+      ],
+      "type": "object"
+    },
     "NetworkApprovalProtocol": {
       "enum": [
         "http",
@@ -5339,6 +5368,26 @@
       "title": "Model/reroutedNotification",
       "type": "object"
     },
+    {
+      "properties": {
+        "method": {
+          "enum": [
+            "model/verification"
+          ],
+          "title": "Model/verificationNotificationMethod",
+          "type": "string"
+        },
+        "params": {
+          "$ref": "#/definitions/ModelVerificationNotification"
+        }
+      },
+      "required": [
+        "method",
+        "params"
+      ],
+      "title": "Model/verificationNotification",
+      "type": "object"
+    },
     {
       "properties": {
         "method": {