Production embedding monitoring with RobustPCA
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reference shape: (720, 48)
production shape: (1080, 48)
retained components: 6
robust subspace error: 0.073
empirical subspace error: 1.415
robust/empirical error ratio: 0.052
clean-score covariance off-diagonal norm, robust: 0.374
clean-score covariance off-diagonal norm, empirical: 2.936
median score distance, baseline batches: 4.746
median score distance, drift batches: 5.481
90th-percentile orthogonal distance, baseline batches: 0.737
90th-percentile orthogonal distance, OOD-mixture batches: 4.511
median orthogonal distance, OOD points: 4.524
median orthogonal distance, non-OOD points: 0.656
