Added opt-in training least-squares rescaling to hr() and cv_hr(). Numerical path, scale and CV score calculations use RcppArmadillo.
Added fixed positive scale arguments and oracle scale information to exact risk and SURE routines. These exact formulas apply to fixed tuning and a fixed scale, not a scale estimated from the same response.
Preserved the default unscaled estimator and fold-local threshold fractions.
Retained rank-aware minimum-norm least-squares refitting and documented explicit absolute grids for independent implementation comparison.
Shared GitHub documentation (2026-10-25)
Added a common entry point for softridge and scaleCorrection, installation instructions, naming map, worked examples and reproduction guidance.
Added software citations and package-specific reference documentation.
Preserved numerical functions, package APIs and historical reproduction engines.
