Makes connectivity graph Multigraph
Bugfix: The connectivity graph was connected a normal DiGraph but in fact is a MultiDiGraph, as there may be multiple connections between any two modules
2025-09-18: Due to updates GitLab may be unavailable for some minutes between 10:00 and 13:00.
Bugfix: The connectivity graph was connected a normal DiGraph but in fact is a MultiDiGraph, as there may be multiple connections between any two modules