chore: update OpenAPI spec from monorepo (#324)

Co-authored-by: OpenRouter SDK Bot <sdk-bot@openrouter.ai>

.speakeasy/in.openapi.yaml

@@ -1108,6 +1108,7 @@ components:
                 - content
               type: object
             - $ref: '#/components/schemas/AnthropicUrlPdfSource'
+            - $ref: '#/components/schemas/AnthropicFileDocumentSource'
         title:
           nullable: true
           type: string
@@ -1148,6 +1149,21 @@ components:
         - stderr
         - type
       type: object
+    AnthropicFileDocumentSource:
+      example:
+        file_id: file_011CNha8iCJcU1wXNR6q4V8w
+        type: file
+      properties:
+        file_id:
+          type: string
+        type:
+          enum:
+            - file
+          type: string
+      required:
+        - type
+        - file_id
+      type: object
     AnthropicImageBlockParam:
       example:
         source: