Cryptic error message when `setup_mode` of cassandra table is set to incorrect type

[jordanrfrazier]

Summary
I was using the Langchain C* class and noticed that if you accidentally use a string for the setup_mode, you'll get a cryptic error that you may end up debugging for too long 🙃 . I'm guessing it sneaks into the CQL create statement somehow?

repro

import cassio

from typing import Any, List, Optional, Union, Tuple
from langchain_community.vectorstores import Cassandra
from langchain_community.utilities.cassandra import SetupMode

from langchain_openai import OpenAIEmbeddings

database_id = "..."
token = "..."
table_name = "test"

def build():
    cassio.init(
        database_id=database_id,
        token=token,
    )
    embedding = OpenAIEmbeddings(api_key="...")
    table = Cassandra(
        embedding=embedding,
        table_name=table_name,
        keyspace="default_keyspace",
        setup_mode="Sync" # Accidentally had this as a string instead of SetupMode
        # setup_mode=SetupMode.SYNC, # the correct param
    )
    res = table.search("random query", search_type="similarity")
    print(res)

build()

Run this twice, and you'll see:

cassandra.protocol.SyntaxException: <Error from server: code=2000 [Syntax error in CQL query] message="line 1:107 mismatched input 'None' expecting INTEGER (... TEXT,   vector VECTOR<FLOAT,[None]...)">

Versions
langchain 0.1.19
langchain-community 0.0.38
langchain-core 0.1.52
cassio 0.1.7
Python 3.11.2