Bento Service does not support pandas.core.series.Series as a type

[ilyanoskov]

Describe the bug

I am using AsyncHTTPClient with Pandas dataframe as input to one of my services. I have created a simple Dataframe and use from_sample method to generate an input spec:

@svc.api(input=input_spec, output=JSON())
async def predict_vals(input_df: pd.Dataframe):
    ....

I get an error:

<class pandas.core.series.Series> is not yet supported

I think this has something to do with this #TODO comment:

BentoML/src/bentoml/_internal/io_descriptors/pandas.py

Line 440 in 1dbfb4f

# TODO: support extension dtypes

To reproduce

No response

Expected behavior

No response

Environment

BentoML: 1.2.9
Python: 3.11