cubicweb-trackervcs #1872837 SetSourceRepositoryOp should run on cube addition [resolved]

When adding trackervcs to an instance, the source_repository relation should be synchronised with the existing has_apycot_environment.

prioritynormal
typebug
done in0.7.0
load left0.000
closed by#a0878999a97f Initialize the source_repository relation when the cube gets added (closes #1872837)