Ensure seed consistency

[vdplasthijs]

Currently random seeds are set in various places. Can we make this consistent & configurable?

[vdplasthijs]

https://github.com/search?q=repo%3AWUR-AI%2Faether%20seed&type=code

[vdplasthijs]

Closing this as all seeds are now handled through hydra configs, except for 1 instance in preprocessing code (aux data butterfly), but this isn't part of the model.