refactor(api): migrate workspace model endpoints to BaseModel (#37963)

Co-authored-by: Asuka Minato <i@asukaminato.eu.org>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Byron Wang <byron@dify.ai>

api/controllers/common/fields.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Any
+from typing import Any, Literal
 
 from pydantic import BaseModel, ConfigDict, Field, RootModel, computed_field
 
@@ -52,6 +52,11 @@ class AudioTranscriptResponse(ResponseModel):
     text: str
 
 
+class ValidationResultResponse(ResponseModel):
+    result: Literal["success", "error"]
+    error: str | None = None
+
+
 class SimpleResultMessageResponse(ResponseModel):
     result: str
     message: str