Set default to error instead of drop (#259)

when encountering bad input data, we can default to principle of least
surprise and raise an exception.

Co-authored-by: Chang She <chang@lancedb.com>

python/lancedb/query.py

@@ -13,7 +13,7 @@
 from __future__ import annotations
 
 import asyncio
-from typing import Awaitable, Literal
+from typing import Literal
 
 import numpy as np
 import pandas as pd