refactor: fix OpenAPI contract generation schemas (#37387)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/controllers/common/fields.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Any
 
-from pydantic import BaseModel, ConfigDict, Field, computed_field
+from pydantic import BaseModel, ConfigDict, Field, RootModel, computed_field
 
 from fields.base import ResponseModel
 from graphon.file import helpers as file_helpers
@@ -24,6 +24,34 @@ class SimpleResultResponse(ResponseModel):
     result: str
 
 
+class GeneratedAppResponse(RootModel[JSONValue]):
+    root: JSONValue
+
+
+class EventStreamResponse(RootModel[str]):
+    root: str
+
+
+class TextFileResponse(RootModel[str]):
+    root: str
+
+
+class RedirectResponse(RootModel[str]):
+    root: str
+
+
+class BinaryFileResponse(RootModel[bytes]):
+    root: bytes
+
+
+class AudioBinaryResponse(RootModel[bytes]):
+    root: bytes
+
+
+class AudioTranscriptResponse(ResponseModel):
+    text: str
+
+
 class SimpleResultMessageResponse(ResponseModel):
     result: str
     message: str