Moving files leads to same hash

[spoorcc]

This test will fail:

def test_hash_directory_differs_for_same_name_in_different_subdirs(tmp_path):
    """Files with identical names but in different sub-directories must affect the hash."""
    d1 = tmp_path / "proj1"
    d1.mkdir()
    (d1 / "a").mkdir()
    (d1 / "a" / "file.txt").write_text("in a")

    d2 = tmp_path / "proj2"
    d2.mkdir()
    (d2 / "b").mkdir()
    (d2 / "b" / "file.txt").write_text("in a")

    assert hash_directory(str(d1), None) != hash_directory(str(d2), None)