feat: 添加 Laravel Reverb 支持，更新 .env.example 文件以配置 WebSocket，增强彩票调度功能，更新 API 路由以支持期号管理与结果发布

app/Http/Controllers/Api/V1/Draw/DrawCurrentController.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1\Draw;
+
+use App\Http\Controllers\Controller;
+use App\Services\Draw\DrawHallSnapshotBuilder;
+use App\Support\ApiResponse;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+/**
+ * 下注大厅：`GET /api/v1/draw/current`。
+ */
+class DrawCurrentController extends Controller
+{
+    public function __construct(
+        private readonly DrawHallSnapshotBuilder $snapshot,
+    ) {}
+
+    public function __invoke(Request $request): JsonResponse
+    {
+        return ApiResponse::success($this->snapshot->build());
+    }
+}