[WIP] Retrain

[turian]

retrain the model given annotations.

• [ ] compute AUC at env of validation (https://torchmetrics.readthedocs.io/en/latest/references/modules.html#auc)
• [ ] implement early stopping based upon AUC
• [ ] shuffling of training set
• [ ] If rows in the same file have duplicates (because they were labeled twice), only include one
• [ ] kfold validation
• [ ] Learnable STFT and mel kernel for openl3 model