codex: fix env registry protocol CI follow-ups

Co-authored-by: Codex <noreply@openai.com>

codex-rs/app-server-protocol/schema/json/v2/EnvironmentListResponse.json

@@ -0,0 +1,41 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "definitions": {
+    "EnvironmentListEntry": {
+      "properties": {
+        "environmentId": {
+          "type": "string"
+        },
+        "execServerUrl": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "environmentId"
+      ],
+      "type": "object"
+    }
+  },
+  "properties": {
+    "data": {
+      "items": {
+        "$ref": "#/definitions/EnvironmentListEntry"
+      },
+      "type": "array"
+    },
+    "nextCursor": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "data"
+  ],
+  "title": "EnvironmentListResponse",
+  "type": "object"
+}