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/Services/Draw/DrawPrizeLayout.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Services\Draw;
+
+/**
+ * 开奖号码行布局（与界面文档 4.6 奖项分区一致）。
+ *
+ * @return array<int, array{prize_type: string, prize_index: int}>
+ */
+final class DrawPrizeLayout
+{
+    public static function slots(): array
+    {
+        $slots = [];
+        foreach (['first', 'second', 'third'] as $tier) {
+            $slots[] = ['prize_type' => $tier, 'prize_index' => 0];
+        }
+        for ($i = 0; $i < 10; $i++) {
+            $slots[] = ['prize_type' => 'starter', 'prize_index' => $i];
+        }
+        for ($i = 0; $i < 10; $i++) {
+            $slots[] = ['prize_type' => 'consolation', 'prize_index' => $i];
+        }
+
+        return $slots;
+    }
+}