fix(tests): add missing reservation repo mock to SummitOrderServiceTest

The SummitOrderService constructor gained an
ISummitPromoCodeMemberReservationRepository parameter in
b1f3abe but this test was not updated.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: caseylocker

tests/SummitOrderServiceTest.php

@@ -120,6 +120,7 @@ public function testProcessSummitOrderRemindersSendsReminders()
         $refund_request_repository = Mockery::mock(ISummitRefundRequestRepository::class)->makePartial();
         $company_service = Mockery::mock(ICompanyService::class);
         $ticket_finder_strategy_factory = Mockery::mock(ITicketFinderStrategyFactory::class);
+        $member_reservation_repository = Mockery::mock(\models\summit\ISummitPromoCodeMemberReservationRepository::class);
         $tx_service = Mockery::mock(ITransactionService::class);
         $lock_service = Mockery::mock(ILockManagerService::class);
 
@@ -219,6 +220,7 @@ public function testProcessSummitOrderRemindersSendsReminders()
             $ticket_type_repository,
             $member_repository,
             $promo_code_repository,
+            $member_reservation_repository,
             $attendee_repository,
             $order_repository,
             $ticket_repository,