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/member_cycle_calculations_test.exs

@@ -118,6 +118,7 @@ defmodule Mv.Membership.MemberCycleCalculationsTest do
 
       # Current cycle
       cycle_start = CalendarCycles.calculate_cycle_start(today, :yearly)
+
       create_cycle(member, fee_type, %{
         cycle_start: cycle_start,
         status: :paid
@@ -179,6 +180,7 @@ defmodule Mv.Membership.MemberCycleCalculationsTest do
 
       # Current cycle
       cycle_start = CalendarCycles.calculate_cycle_start(today, :yearly)
+
       create_cycle(member, fee_type, %{
         cycle_start: cycle_start,
         status: :unpaid
@@ -186,8 +188,10 @@ defmodule Mv.Membership.MemberCycleCalculationsTest do
 
       # Future cycle (if we're not at the end of the year)
       next_year = today.year + 1
+
       if today.month < 12 or today.day < 31 do
         next_year_start = Date.new!(next_year, 1, 1)
+
         create_cycle(member, fee_type, %{
           cycle_start: next_year_start,
           status: :unpaid
@@ -265,6 +269,7 @@ defmodule Mv.Membership.MemberCycleCalculationsTest do
       })
 
       cycle_start = CalendarCycles.calculate_cycle_start(today, :yearly)
+
       create_cycle(member, fee_type, %{
         cycle_start: cycle_start,
         status: :unpaid
@@ -279,4 +284,3 @@ defmodule Mv.Membership.MemberCycleCalculationsTest do
     end
   end
 end
-