tweak DomainObject comparisons
This change should make comparisons between DomainObjects (which happen quite often) much faster.
We’ve updated our runner tagging system. If you’re using our shared runners for your CI pipelines, please review the new tags here: https://docs.mpcdf.mpg.de/bnb/220.html#new-tags-for-mpcdf-gitlab-runners
The old tags will remain valid until the end of February 2026.
This change should make comparisons between DomainObjects (which happen quite often) much faster.