refactor: 迁移彩票设置至 LotterySettings 服务

- 更新多个控制器和服务，使用 LotterySettings 服务获取彩票相关配置，如默认币种、开奖间隔、下注窗口等，提升代码一致性与可维护性。
- 移除 .env.example 中不再使用的配置项，建议通过后台管理进行设置。

app/Services/Draw/DrawRngRunner.php

@@ -28,10 +28,7 @@ final class DrawRngRunner
             'status' => DrawStatus::Drawing->value,
         ])->save();
 
-        $manualReview = (bool) LotterySettings::get(
-            'draw.require_manual_review',
-            (bool) config('lottery.draw.require_manual_review', false),
-        );
+        $manualReview = LotterySettings::drawRequireManualReview();
         $seedHex = DrawRngSeedDerivation::generateSeedHex();
         $rngSeedHash = DrawRngSeedDerivation::hashSeedHex($seedHex);
         $rawSeedEncrypted = DrawRngSeedDerivation::encryptSeedHex($seedHex);