Fix TreeEnsemble LOGISTIC post_transform for single target regression #26896
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Fixes microsoft#26596 - Updated FinalizeScores1 methods in TreeAggregator, TreeAggregatorSum, and TreeAggregatorAverage to handle LOGISTIC transform - Added test case TreeEnsembleSingleTargetLogistic to verify correct behavior
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Fixes #26596
Description
FinalizeScores1methods only checked for PROBIT transform and ignored LOGISTIC, causing models to output raw scores instead of applying the logistic function.Motivation and Context
post_transform=LOGISTICto return raw prediction scores (10.0) instead of transformed values (0.9999546).