List Stuck Payments

List payments stuck in pending (>1 hour) or activation_failed state.

Also surfaces recently swept "cancelled" orders: the sweeper cancels two hours after checkout but the Cashfree order lives 30 days, so a cancelled row is not proof the money was never taken — only Cashfree is. Scoped to the order lifetime so the 4k-row historical backlog does not drown the list.