kfolding revisited (transitional PR)
Created by: scarlehoff
A collection of bugfixes an enhancements to the hyperparameter scan.
Builds on #766 which builds on #760 which builds on #745
Some of the changes are basically a rationalization on how the kfolding was done which was unnecessarily complicated because of the huge memory usage, but that's solved in the previous PRs.
Note: this PR will become an amalgamation of many things that are useful / make things better but belong in different PRs, once the kfolding-developing chapter is finished I'll do those self-contained PRs.