Atlas Edit Weekly Cycle Adds Diamond PAU, Cuts SparkLend Ratio

Atlas Edit Weekly Cycle proposal submitted by Core GovOps. Adds Diamond PAU subtree with PAS placeholder; permits 5% excess exposure for accrued interest, Prime Agent reclaims it; clarifies Smart Burn Engine parameter governance; cuts Osero SparkLend USDS capital ratio 100%→25%; standardizes Operational Weekly Cycle terminology. Review PR #292.