fix [QUA-232] Streaming response returns filedata_meta when handling exception (#56)

For description of the problem, see:

https://linear.app/unstructured/issue/QUA-232/indexer-errors-get-swallowed-as-pydantic-validation-errors

Author: six5532one

unstructured_platform_plugins/__version__.py

@@ -1 +1 @@
-__version__ = "0.0.34"  # pragma: no cover
+__version__ = "0.0.35"  # pragma: no cover

unstructured_platform_plugins/etl_uvicorn/api_generator.py

@@ -190,7 +190,7 @@ async def _stream_response():
                             InvokeResponse(
                                 usage=usage,
                                 message_channels=message_channels,
-                                filedata_meta=None,
+                                filedata_meta=filedata_meta_model.model_validate(filedata_meta.model_dump()),
                                 status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
                                 status_code_text=f"[{e.__class__.__name__}] {e}",
                             ).model_dump_json()