Please let me add one additional thought.It seems easy to me to extract he meta data (via importlib.metadata) from a python project that suites to the python packaging standards (providing a pyproject.toml, setup.cfg and things like that).
In that case it seems easy to have a debian-python-packaging-magic-tool on your site that will extract the data, generate a metainfo file and add it to the debian package.
Kind Christian