Multiple bug fixes:
- the error where seq2print_tfbs might ended up using only the last model, instead of averaging over five folds
Multiple improvement:
- support custom region names, if there is a column "region_names" in the region provided, those would be used to name results instead of the standard chr1:0-10000 etc.
- better verbose
- chromvar also chunk over TF axis for larger datasets
- More robust LoRA training with better coverage warming stages