"""Make the `app` package importable when running pytest from the backend dir.

Without this, `pytest` fails to collect tests with
`ModuleNotFoundError: No module named 'app'`. Insert the backend root (the
parent of app/) onto sys.path so `python -m pytest` works from anywhere.
"""
import sys
from pathlib import Path

_BACKEND_ROOT = Path(__file__).resolve().parent.parent
if str(_BACKEND_ROOT) not in sys.path:
    sys.path.insert(0, str(_BACKEND_ROOT))