[Python][Parquet] FIXED_LEN_BYTE_ARRAY fails to cast to UUID on Python 3.14 / Nightly builds

[GiTaDi-CrEaTe]

Describe the bug, including details regarding any error messages, version, and platform.

Description of the bug

When writing uuid.UUID objects to Parquet using PyArrow, the data is correctly stored as a FIXED_LEN_BYTE_ARRAY. However, when reading this data back on Python 3.14 / Nightly builds, PyArrow fails to cast the 16 bytes back into Python uuid.UUID objects, instead returning raw bytes.

This works perfectly on Python 3.13 and below, but introduces a regression on other builds.

To Reproduce:

import pyarrow as pa
import pyarrow.parquet as pq
import pandas as pd
import uuid

# Create a simple table with a UUID
original_uuid = uuid.uuid4()
df = pd.DataFrame({"id": [original_uuid]})
table = pa.Table.from_pandas(df)

# Write to parquet and read back
pq.write_table(table, "test_uuid.parquet")
read_table = pq.read_table("test_uuid.parquet")
result_df = read_table.to_pandas()

# On Python 3.13, this is a uuid.UUID object. 
# On Python 3.14 / Nightly, this is raw bytes.
print(type(result_df.loc[0, "id"]))

---
This was discovered while adding upstream UUID Parquet tests to the pandas test suite (pandas-dev/pandas#65647).

### Component(s)

Python, Parquet

[parker-cassar]

I'll give this a go, it's okay if someone else fixes it before me, but I'll try to get a fix within 24 hours.