setuptools 78.0.1 introduced strong enforcement of rules disallowing uppercase or dashes in setup.cfg metadata - "description-file" breaks this. Please remove or rename metadata for compatibility.

https://github.com/pypa/setuptools/blob/main/NEWS.rst#v7800

Deprecations and Removals
Setuptools no longer accepts options containing uppercase or dash characters in setup.cfg. Please ensure to write the options in setup.cfg using the :wiki:lower_snake_case <Snake_case> convention (e.g. Name => name, install-requires => install_requires). This is a follow-up on deprecations introduced in v54.1.0 (see #1608) and v54.1.1 (see #2592).