older_than reads a naive datetime as UTC and expires snapshots it should keep #4182

import os, time, tempfile
os.environ["TZ"] = "Asia/Tokyo"  # UTC+9, any zone east of UTC does it
time.tzset()

from datetime import datetime, timedelta
import pyarrow as pa
from pyiceberg.catalog.sql import SqlCatalog

cat = SqlCatalog("c", uri="sqlite:///:memory:", warehouse=f"file://{tempfile.mkdtemp()}")
cat.create_namespace("ns")
t = cat.create_table("ns.t", schema=pa.schema([("x", pa.int64())]))
for x in (1, 2, 3):
    t.append(pa.table({"x": [x]}))

t.maintenance.expire_snapshots().older_than(datetime.now() - timedelta(hours=1)).commit()
print(len(cat.load_table("ns.t").snapshots()))
# 1, should be 3
# all three snapshots are seconds old, so none is older than an hour