feat: regenerate cycles when membership fee type changes (same interval)

- Implemented regenerate_cycles_on_type_change helper in Member resource
- Cycles that haven't ended yet (cycle_end >= today) are deleted and regenerated
- Paid and suspended cycles remain unchanged (not deleted)
- CycleGenerator reloads member with new membership_fee_type_id
- Adjusted tests to work with current cycles only (no future cycles)
- All integration tests passing

Phase 4 completed: Cycle regeneration on type change

test/membership_fees/changes/validate_same_interval_test.exs

@@ -70,6 +70,7 @@ defmodule Mv.MembershipFees.Changes.ValidateSameIntervalTest do
 
       refute changeset.valid?
       assert %{errors: errors} = changeset
+
       assert Enum.any?(errors, fn error ->
                error.field == :membership_fee_type_id and
                  error.message =~ "yearly" and
@@ -79,7 +80,8 @@ defmodule Mv.MembershipFees.Changes.ValidateSameIntervalTest do
 
     test "allows first assignment of membership fee type" do
       yearly_type = create_fee_type(%{interval: :yearly})
-      member = create_member(%{}) # No fee type assigned
+      # No fee type assigned
+      member = create_member(%{})
 
       changeset =
         member