adding concordance index and Brier score to overall/class statistics depicted for survival model predictions

[myacinecoding]

The concordance index and Brier score are commonly used calibration and discrimination metrics for survival analysis/time to event models. The concordance index is a metric similar to AUC that also accounts for right censoring. I would really appreciate adding these. in the calculated class/overall statistics. Thank you.

Examples shown in the scikit code for survival forests:
https://scikit-survival.readthedocs.io/en/stable/user_guide/evaluating-survival-models.html