Parameter uncertainty

Use Samples and bootstrap to summarize a scalar parameter estimator, or use CovarianceMatrix with linear_propagate when you have a local gradient and an estimated joint covariance. profile_quadratic fits a local quadratic profile over supplied parameter-score points.

These tools do not fit a parameter posterior, compute a Hessian from a World, or infer parameter covariance from a discovery candidate. Supply the estimator and evaluation domain explicitly.