How to use new Vanna 2.0 without its web ui / as part of another fastapi server?

[kubni]

Hello.

I am aware of the section in the docs (https://vanna.ai/docs/placeholder/deployment/fastapi) which has a section called "Adding to an Existing FastAPI App".
However, that registers vanna's endpoints like /, /api/vanna/v2/chat_sse, /api/vanna/v2/chat_poll.

I wanted to use my own UI for chatting with Vanna LLMs instead of it "hijacking" my /.
Is that possible?
How would it be done?
For example, here is my example endpoint which allows users to upload a CSV file and a query:

@app.post("/csv-ai-plot/")
async def query_csv_and_plot(
    query: str = Form(...),
    file: UploadFile = File(...),
):
    # Read CSV into a DataFrame
    csv_file_contents = await file.read()
    df = pd.read_csv(StringIO(csv_file_contents.decode("utf-8")))

    sqlite_db = "mydatabase.db"
    engine = create_engine(f"sqlite:///{sqlite_db}")

    df.to_sql(
        file.filename or "filename_none", engine, if_exists="replace", index=False
    )

How would I utilize vanna to accomplish what user says here, for example: "Graph top 10 countries by GDP" ?

To me, it seems like ChatHandler's handle_stream should be used, but I don't see an example of that usecase.

[kubni]

Before, in Vanna 0.6.7, I used Vanna to generate plotly data which I sent to the frontend where react-plotly.js rendered it.
I would like to do that now too.