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

tests/test_project_manager_tracks.py

@@ -1,7 +1,6 @@
 import pytest
 from typing import Any
 import json
-from pathlib import Path
 from project_manager import get_all_tracks, save_track_state
 from models import TrackState, Metadata, Ticket
 from datetime import datetime