Values of a single target type that share a transaction with a single source entity inside the window, most shared transactions first, with the decline/fraud/chargeback split, USD sum and first/last seen per member so the row can be risk-coloured without a second call. The total is exact and comes free from the same pass the ranking already needs; it is null only when the requested page is past the last member. BLACK_LIST members are the company black lists the source value itself appears on, read from Postgres — their transaction-derived fields are null. The window is required and its span is capped server-side