feat(identity): tip QR upload, metrics engine, comment moderate caps

Close identity 1:1 gaps after p1: user-center weixin/alipay tip QR
upload+save, AKSRT_User_Metrics counters for medal get_type and level
XP bridges, forum/revenue/signin hooks, comment moderate via user_caps,
and clearer free-task deep links/status CTAs.

functions.php

@@ -373,6 +373,9 @@ if (class_exists('AKSRT_User_Badges_Admin')) {
 if (class_exists('AKSRT_User_Level')) {
     AKSRT_User_Level::get_instance()->init();
 }
+if (class_exists('AKSRT_User_Metrics')) {
+    AKSRT_User_Metrics::get_instance()->init();
+}
 
 // WordPress 原生侧栏：支付/订单运营中心（zibll zibpay 对齐）
 if (is_admin() && class_exists('AKSRT_Admin_Pay_Menus')) {