Fix fern check errors for data attribute request types

Map snake_case schema names to PascalCase for CreateDataAttributeRequest
and UpdateDataAttributeRequest to resolve type definition errors in fern check.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: marcmlc

fern/unstable-openapi-overrides.yml

@@ -1,4 +1,18 @@
 paths:
+  '/data_attributes':
+    post:
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/CreateDataAttributeRequest'
+  '/data_attributes/{id}':
+    put:
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UpdateDataAttributeRequest'
   '/articles':
     post:
       requestBody:
@@ -98,6 +112,10 @@ paths:
 
 components:
   schemas:
+    create_data_attribute_request:
+      x-fern-type-name: CreateDataAttributeRequest
+    update_data_attribute_request:
+      x-fern-type-name: UpdateDataAttributeRequest
     custom_attributes:
       example:
         monthly_spend: '155.5'