chore: apply ruff auto-fixes and remove dead AST scripts

tests/test_logging_e2e.py

@@ -1,12 +1,8 @@
-import os
-import shutil
 import pytest
 from typing import Any
 from pathlib import Path
 from datetime import datetime, timedelta
-from unittest.mock import patch
 import session_logger
-import tomllib
 from log_registry import LogRegistry
 from log_pruner import LogPruner