To avoid eventual compatibility issues and as a matter of precaution, it is appropriate to maintain both ansible-core and ansible as one package group (e.g. package, release and move new versions of those packages accross repositories together).
See the ansible package README for more details.

Specific / strict upper version bound for (python-)resolvelib

Upstream seems very cautious with resolvelib bumps and use very specific / strict version bounds for it in their dependencies definitions (used by ansible-galaxy).

As such, it may happen that the build and / or the check processes require an outdated version of python-resolvelib compared to the one available in our repository. In such cases, patching sources to increase the upper version bound for resolvelib is most likely enough to build the package succesfully (while waiting for upstream to do the change on their side).
Despite upstream carefulness on that matter (apparently for past / historic reasons), we should not expect any breaking changes in minor resolvelib bumps.