eval_toolkit.stacking

Detector stacking via the MetaLearner Protocol (v0.45 reference impl: LogisticStacker). Combine multiple binary scorers’ calibrated outputs into a single P(positive) estimate on a held-out stacking set.

LogisticStacker	Reference MetaLearner using sklearn.linear_model.LogisticRegression.
MetaLearner	Combines per-sample scores from multiple base detectors into P(positive).