refactor(tests): Add strict type hints to sixth batch of test files

tests/test_track_state_persistence.py

@@ -8,7 +8,7 @@ from models import TrackState, Metadata, Ticket
 # Import the persistence functions from project_manager
 from project_manager import save_track_state, load_track_state
 
-def test_track_state_persistence(tmp_path):
+def test_track_state_persistence(tmp_path) -> None:
  """
     Tests saving and loading a TrackState object to/from a TOML file.
     1. Create a TrackState object with sample metadata, discussion, and tasks.