fix(limit-purchase): 修复默认规则查询类名错误

- 将 GoodsLimitPurchaseRuleModel 更正为 LimitPurchaseRuleModel
- 确保默认规则查询逻辑正确执行
- 避免因类名错误导致的规则匹配失败

src/Entity/GoodsLimitPurchaseRuleEntity.php

@@ -42,7 +42,7 @@ class GoodsLimitPurchaseRuleEntity extends BaseEntity
     {
         $entity = $this->with(['rule'])->where(['goods_id' => $goodsID])->findOrEmpty();
         if ($entity->isEmpty() || $entity->rule->status === false) {
-            $defaultRule = GoodsLimitPurchaseRuleModel::where(['is_default' => true, 'status' => true])->findOrEmpty();
+            $defaultRule = LimitPurchaseRuleModel::where(['is_default' => true, 'status' => true])->findOrEmpty();
             if ($defaultRule->isEmpty()) {
                 return false;
             }