evaluate gitlab optimisations for large / monorepos
While looking at GitLab backups (#40518), I stumbled upon this page:
https://docs.gitlab.com/ee/user/project/repository/monorepos/
It has interesting recommendations for "monorepos" which, really, they mean "large reqpositories". We should look into those directives and see what optimizations we could make.
This is mostly for the applications' team repositories, of course, so /cc @richard