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/Models/DrawResultBatch.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Models;
+
+use App\Lottery\DrawResultBatchStatus;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+/** 开奖结果批次（含 RNG 种子摘要、审核人） {@see draw_result_batches} */
+class DrawResultBatch extends Model
+{
+    public $timestamps = true;
+
+    protected $fillable = [
+        'draw_id',
+        'result_version',
+        'source_type',
+        'rng_seed_hash',
+        'raw_seed_encrypted',
+        'status',
+        'created_by',
+        'confirmed_by',
+        'confirmed_at',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'result_version' => 'integer',
+            'confirmed_at' => 'datetime',
+        ];
+    }
+
+    public function draw(): BelongsTo
+    {
+        return $this->belongsTo(Draw::class);
+    }
+
+    public function items(): HasMany
+    {
+        return $this->hasMany(DrawResultItem::class, 'result_batch_id');
+    }
+
+    public function statusEnum(): ?DrawResultBatchStatus
+    {
+        return DrawResultBatchStatus::tryFrom((string) $this->status);
+    }
+}