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/Observers/ServerRouteObserver.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Observers;
+
+use App\Models\Server;
+use App\Models\ServerRoute;
+use App\Services\NodeSyncService;
+
+class ServerRouteObserver
+{
+    public function updated(ServerRoute $route): void
+    {
+        $this->notifyAffectedNodes($route->id);
+    }
+
+    public function deleted(ServerRoute $route): void
+    {
+        $this->notifyAffectedNodes($route->id);
+    }
+
+    private function notifyAffectedNodes(int $routeId): void
+    {
+        $servers = Server::where('show', 1)->get()->filter(
+            fn ($s) => in_array($routeId, $s->route_ids ?? [])
+        );
+
+        foreach ($servers as $server) {
+            NodeSyncService::notifyConfigUpdated($server->id);
+        }
+    }
+}