feat: introduce WebSocket sync for XBoard nodes

- Implement Workerman-based `xboard:ws-server` for real-time node synchronization.
- Support custom routes, outbounds, and certificate configurations via JSON.
- Optimize scheduled tasks with `lazyById` to minimize memory footprint.
- Enhance reactivity using Observers for `Plan`, `Server`, and `ServerRoute`.
- Expand protocol support for `httpupgrade`, `h2`, and `mieru`.

app/Services/OrderService.php

@@ -95,13 +95,14 @@ class OrderService
     public function open(): void
     {
         $order = $this->order;
-        $this->user = User::find($order->user_id);
         $plan = Plan::find($order->plan_id);
 
         HookManager::call('order.open.before', $order);
 
 
         DB::transaction(function () use ($order, $plan) {
+            $this->user = User::lockForUpdate()->find($order->user_id);
+
             if ($order->refund_amount) {
                 $this->user->balance += $order->refund_amount;
             }