Update README with uncertainty quantification results and improved documentation

Add quantile regression calibration results

Add quantile model: mag_q90

Add quantile model: mag_q50

Add quantile model: mag_q10

Add quantile model: days_q90

Add quantile model: days_q50

Add quantile model: days_q10

Remove old CNN model (images don't help - LightGBM on metadata is production model)

Production LightGBM model — 49 features, 5-fold GroupKFold CV

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initial commit