plugin misses compiled modules which are not included in any `__init__.py` listing

[ev-br]

Case in point: scipy.fftpack.convolve namespace. It comes from a standalone Cython source, https://github.com/scipy/scipy/blob/main/scipy/fftpack/meson.build#L1, and its contents is not included into scipy.fftpack namespace, https://github.com/scipy/scipy/blob/main/scipy/fftpack/__init__.py

[ev-br]

The fix is probably to implement pytest_collect_file: the vanilla doctest version only looks into *py files:
https://github.com/pytest-dev/pytest/blob/8.0.x/src/_pytest/doctest.py#L127

cross-ref #99 (comment) for links to upstream pytest discussions.