ADK async_stream_query doesn't capture error

[eakertFacet]

At https://github.com/googleapis/python-aiplatform/blob/main/vertexai/agent_engines/templates/adk.py#L1204, there is a try: and finally: block but no except:.

This means that any error that occurs in a query request doesn't get captured and instead returns a blank string.
Can we add exception handling here and return back to the client?

[maxgasztych]

This is not correct, the try finally doesn't swallow the errors, but rethrows them. There might have been some other issue going on, so please add more context.