fix: update integration test, remove unused import, fix stale comment

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/test_backup.py

@@ -1,6 +1,4 @@
 from datetime import datetime, timezone
-from pathlib import Path
-
 from order_bak.csv_utils import write_csv
 from order_bak.backup import backup_orders
 
@@ -33,7 +31,7 @@ def test_backup_filters_by_state_and_date(tmp_path):
         _make_entity("u1", "o1", datetime(2025, 1, 1, 10, tzinfo=timezone.utc), 1),
         _make_entity("u2", "o2", datetime(2025, 1, 1, 12, tzinfo=timezone.utc), 0),  # Payed, skip
         _make_entity("u3", "o3", datetime(2025, 1, 2, 8, tzinfo=timezone.utc), 1),
-        _make_entity("u4", "o4", datetime(2025, 1, 3, 8, tzinfo=timezone.utc), 1),  # outside range
+        _make_entity("u4", "o4", datetime(2025, 1, 3, 8, tzinfo=timezone.utc), 1),  # at cutoff, skip
     ]
     scan_csv = scan_dir / "scan-2025-01-03.csv"
     write_csv(scan_csv, entities)

tests/test_integration.py

@@ -123,13 +123,12 @@ def test_full_pipeline(table_client, tmp_path):
     scan_rows = list(read_csv(scan_path))
     assert len(scan_rows) == len(orders)  # all orders, no filtering
 
-    # --- Backup (Jan 1-2 only) ---
+    # --- Backup (before Jan 3) ---
     backup_dir = tmp_path / "backups"
     count = backup_orders(
         scan_path=scan_path,
         backup_dir=backup_dir,
-        start=datetime(2025, 1, 1, tzinfo=timezone.utc),
-        end=datetime(2025, 1, 3, tzinfo=timezone.utc),
+        cutoff=datetime(2025, 1, 3, tzinfo=timezone.utc),
     )
     # 2 days × 2 users × 2 Recived = 8 orders
     assert count == 8