This bug is part of the non-responsive maintainer procedure for cheimes, following https://docs.fedoraproject.org/en-US/fesco/Policy_for_nonresponsive_package_maintainers/. Please respond if you are still active in Fedora and want to maintain python-setuptools-rust.
I'm maintaining python-setuptools-rust as build dependency for python-cryptography. In general I'm conservative with updates and only update python-setuptools-rust to a newer version, if the need arises. If you need newer versions of python-setuptools-rust for other Fedora packages, then I'm happy to invite you as a co-maintainer. Please keep in mind that python-cryptography stability has priority. It's in the critical path for a lot of components including FreeIPA.
Christian, please add @python-packagers-sig as a co-maintainer. We generally perform impact checks to see if upgrades break anything and you don't need to worry about us updating setuptools-rust to a version that breaks cryptography. I can even add a CI test that builds cryptography if you are really concerned.
@python-packagers-sig now has commit privileges. I would appreciate a CI test. In the past upstream PyCA cryptography had limited the upper version of python-setuptools-rust because they targeted older Python versions (3.6) or more recent setuptools-rust versions were breaking things.
https://src.fedoraproject.org/rpms/python-setuptools-rust/pull-request/6
Thanks for the test case! I have merged your PR.