fix(tests): reset_paths fixture should not clear at teardown (breaks atexit callbacks)

tests/conftest.py

@@ -423,15 +423,14 @@ def isolate_workspace(monkeypatch) -> Generator[None, None, None]:
 @pytest.fixture(autouse=True)
 def reset_paths() -> Generator[None, None, None]:
  """
- Autouse fixture that resets the paths singleton before each test.
- The isolate_workspace fixture re-initializes paths before the test runs,
- so reset_paths is a no-op here (PathsConfig is frozen at init time,
- the per-getter cache is gone). Kept as a marker for backward compatibility
- with test code that asserts the singleton is cleared at test boundaries.
+ Autouse marker fixture. No-op at setup AND teardown — PathsConfig is
+ frozen at init time, and clearing it would break atexit callbacks
+ (e.g., session_logger.close_session) that fire after pytest finishes.
+ If a test needs a fresh paths graph, it must call paths.initialize_paths()
+ explicitly. See src/paths.py docstring for the explicit-init contract.
  """
  from src import paths
  yield
- paths.reset_paths()
 
 @pytest.fixture(autouse=True)
 def reset_ai_client() -> Generator[None, None, None]: