feat(vip): implement layered membership expiry flow

functions.php

@@ -111,7 +111,7 @@ add_filter('query_vars', function ($vars) {
 
 // 主题切换离开时：清理本主题注册的 cron 任务
 add_action('switch_theme', function () {
-    $hooks = ['aksrt_dl_token_cleanup', 'aksrt_email_verification_backfill_batch', 'aksrt_notification_cleanup', 'aksrt_creator_income_settlement'];
+    $hooks = ['aksrt_dl_token_cleanup', 'aksrt_email_verification_backfill_batch', 'aksrt_notification_cleanup', 'aksrt_creator_income_settlement', 'aksrt_vip_membership_expiry'];
     foreach ($hooks as $hook) {
         $next = wp_next_scheduled($hook);
         while ($next) {