Arrow: Parquet does not support writing empty structs when creating checkpoint

[echai58]

Environment

Delta-rs version: 0.18.1

Binding: python

---

Bug

What happened:
When trying to create a checkpoint on a table with one non-partition column of binary type, I get the error:

OSError: Arrow: Parquet does not support writing empty structs

I found this PR #2125, whose intention seemed to be to fix exactly this, but doesn't seem to be the case.

What you expected to happen:
To be able to create the checkpoint.

How to reproduce it:

from deltalake import DeltaTable, write_deltalake
import pandas as pd

write_deltalake(
    "test",
    pd.DataFrame.from_dict(
        {
            "p": [1],
            "k": [b'a'],
        }
    ),
    partition_by=["p"],
)

DeltaTable("test").create_checkpoint()