Publication proofing — IQR outlier flags + Explicit missing-value fill: IQR outlier flags + Explicit missing-value fill for supplied publication proofing records (checked_pages, flagged_pages). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200