feat(membership-fee): index fee cycles by member, status and end date

lib/membership_fees/membership_fee_cycle.ex

@@ -36,6 +36,16 @@ defmodule Mv.MembershipFees.MembershipFeeCycle do
   postgres do
     table "membership_fee_cycles"
     repo Mv.Repo
+
+    custom_indexes do
+      # Serves the period-scoped unpaid-cycle count on the member overview:
+      # count of a member's cycles with status = :unpaid and cycle_end in the
+      # active period. The composite (member_id, status, cycle_end) lets the
+      # aggregate seek the per-member unpaid slice and range-scan cycle_end
+      # without touching paid/suspended rows.
+      index [:member_id, :status, :cycle_end],
+        name: "membership_fee_cycles_member_status_end_index"
+    end
   end
 
   resource do