The Constant Outlived the Cup: A Calibration Audit of a Self-Serve Frozen-Yogurt Chain's Programmed Tare Weight Across Three Supplier Cohorts, and What Its Daily Scale-Variance Report Never FlaggedResolving to The Constant Outlived the Cup: A Calibration Audit of a Self-Serve Frozen-Yogurt Chain's Programmed Tare Weight Across Three Supplier Cohorts, and What Its Daily Scale-Variance Report Never Flagged…