fix(vector store)!: fix file content API (#4105)

# What does this PR do?
- changed to match
https://app.stainless.com/api/spec/documented/openai/openapi.documented.yml

## Test Plan
updated test CI

client-sdks/stainless/openapi.yml

@@ -2916,11 +2916,11 @@ paths:
       responses:
         '200':
           description: >-
-            A list of InterleavedContent representing the file contents.
+            A VectorStoreFileContentResponse representing the file contents.
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/VectorStoreFileContentsResponse'
+                $ref: '#/components/schemas/VectorStoreFileContentResponse'
         '400':
           $ref: '#/components/responses/BadRequest400'
         '429':
@@ -10465,41 +10465,35 @@ components:
       title: VectorStoreContent
       description: >-
         Content item from a vector store file or search result.
-    VectorStoreFileContentsResponse:
+    VectorStoreFileContentResponse:
       type: object
       properties:
-        file_id:
+        object:
           type: string
-          description: Unique identifier for the file
-        filename:
-          type: string
-          description: Name of the file
-        attributes:
-          type: object
-          additionalProperties:
-            oneOf:
-              - type: 'null'
-              - type: boolean
-              - type: number
-              - type: string
-              - type: array
-              - type: object
+          const: vector_store.file_content.page
+          default: vector_store.file_content.page
           description: >-
-            Key-value attributes associated with the file
-        content:
+            The object type, which is always `vector_store.file_content.page`
+        data:
           type: array
           items:
             $ref: '#/components/schemas/VectorStoreContent'
-          description: List of content items from the file
+          description: Parsed content of the file
+        has_more:
+          type: boolean
+          description: >-
+            Indicates if there are more content pages to fetch
+        next_page:
+          type: string
+          description: The token for the next page, if any
       additionalProperties: false
       required:
-        - file_id
-        - filename
-        - attributes
-        - content
-      title: VectorStoreFileContentsResponse
+        - object
+        - data
+        - has_more
+      title: VectorStoreFileContentResponse
       description: >-
-        Response from retrieving the contents of a vector store file.
+        Represents the parsed content of a vector store file.
     OpenaiSearchVectorStoreRequest:
       type: object
       properties: