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/PaymentService.php

@@ -25,10 +25,18 @@ class PaymentService
         }
 
         if ($id) {
-            $payment = Payment::find($id)->toArray();
+            $paymentModel = Payment::find($id);
+            if (!$paymentModel) {
+                throw new ApiException('payment not found');
+            }
+            $payment = $paymentModel->toArray();
         }
         if ($uuid) {
-            $payment = Payment::where('uuid', $uuid)->first()->toArray();
+            $paymentModel = Payment::where('uuid', $uuid)->first();
+            if (!$paymentModel) {
+                throw new ApiException('payment not found');
+            }
+            $payment = $paymentModel->toArray();
         }
 
         $this->config = [];