Mackolik Player-aware Transformer

• model_state_dict.pt — PyTorch state dict plus config and feature state.
• checkpoints/epoch_*.pt — per-epoch checkpoints with model and optimizer state.
• checkpoints/latest_checkpoint.json — pointer to the latest and best epoch checkpoints.
• training_config.json — training hyperparameters.
• feature_state.json — vocabularies and numeric feature normalization.
• metrics.json — validation/test metrics and dataset profile.