refactor: 统一业务异常处理，标准化结果码和错误响应

1.  新增并完善ResultCode枚举，补充标准HTTP状态码对应的业务状态码
2.  重构BusinessException，新增基于ResultCode的构造函数和ThrowIf扩展方法
3.  替换所有硬编码的HTTP状态码为统一的ResultCode枚举
4.  优化全局异常中间件，根据业务状态码映射对应HTTP状态码并规范化JSON响应
5.  修复OssImageHelper和AutoDotCodeConsumer中的OSS文件处理逻辑
6.  新增用户答题快照实体类
7.  清理废弃的宠物模块迁移脚本

QYZH.InteractiveMagazine.Service/ProductService.cs

@@ -29,17 +29,17 @@ public class ProductService(
 
         if (string.IsNullOrWhiteSpace(input.Name))
         {
-            throw new BusinessException("商品名称不能为空", 400);
+            throw new BusinessException("商品名称不能为空", ResultCode.BAD_REQUEST);
         }
 
         if (string.IsNullOrWhiteSpace(input.Type))
         {
-            throw new BusinessException("商品类型不能为空", 400);
+            throw new BusinessException("商品类型不能为空", ResultCode.BAD_REQUEST);
         }
 
         if (input.Price < 0)
         {
-            throw new BusinessException("商品价格不能为负数", 400);
+            throw new BusinessException("商品价格不能为负数", ResultCode.BAD_REQUEST);
         }
 
         var product = new Product
@@ -66,7 +66,7 @@ public class ProductService(
         if (!result)
         {
             logger.LogError("商品创建失败，商品名称: {Name}", input.Name);
-            throw new BusinessException("创建商品失败", 500);
+            throw new BusinessException("创建商品失败", ResultCode.GLOBAL_ERROR);
         }
 
         // 将 temp 目录下的图片搬运到正式目录
@@ -113,22 +113,22 @@ public class ProductService(
         if (product == null)
         {
             logger.LogWarning("未找到要更新的商品，ID: {Id}", id);
-            throw new BusinessException("商品不存在", 404);
+            throw new BusinessException("商品不存在", ResultCode.NOT_FOUND);
         }
 
         if (string.IsNullOrWhiteSpace(input.Name))
         {
-            throw new BusinessException("商品名称不能为空", 400);
+            throw new BusinessException("商品名称不能为空", ResultCode.BAD_REQUEST);
         }
 
         if (string.IsNullOrWhiteSpace(input.Type))
         {
-            throw new BusinessException("商品类型不能为空", 400);
+            throw new BusinessException("商品类型不能为空", ResultCode.BAD_REQUEST);
         }
 
         if (input.Price < 0)
         {
-            throw new BusinessException("商品价格不能为负数", 400);
+            throw new BusinessException("商品价格不能为负数", ResultCode.BAD_REQUEST);
         }
 
         // 将 temp 目录下的新图片搬运到正式目录
@@ -158,7 +158,7 @@ public class ProductService(
         if (!result)
         {
             logger.LogError("商品更新失败，ID: {Id}", id);
-            throw new BusinessException("更新商品失败", 500);
+            throw new BusinessException("更新商品失败", ResultCode.GLOBAL_ERROR);
         }
 
         logger.LogInformation("商品更新成功，ID: {Id}", id);
@@ -195,14 +195,14 @@ public class ProductService(
         if (product == null)
         {
             logger.LogWarning("未找到要删除的商品，ID: {Id}", id);
-            throw new BusinessException("商品不存在", 404);
+            throw new BusinessException("商品不存在", ResultCode.NOT_FOUND);
         }
 
         var result = await productRepository.DeleteByIdAsync(id);
         if (!result)
         {
             logger.LogError("商品删除失败，ID: {Id}", id);
-            throw new BusinessException("删除商品失败", 500);
+            throw new BusinessException("删除商品失败", ResultCode.GLOBAL_ERROR);
         }
 
         logger.LogInformation("商品删除成功，ID: {Id}", id);
@@ -219,7 +219,7 @@ public class ProductService(
         if (product == null)
         {
             logger.LogWarning("未找到商品，ID: {Id}", id);
-            throw new BusinessException("商品不存在", 404);
+            throw new BusinessException("商品不存在", ResultCode.NOT_FOUND);
         }
 
         return new ProductOutput
@@ -252,12 +252,12 @@ public class ProductService(
 
         if (input.PageIndex <= 0)
         {
-            throw new BusinessException("页码必须大于0", 400);
+            throw new BusinessException("页码必须大于0", ResultCode.BAD_REQUEST);
         }
 
         if (input.PageSize <= 0 || input.PageSize > 100)
         {
-            throw new BusinessException("每页条数必须在1-100之间", 400);
+            throw new BusinessException("每页条数必须在1-100之间", ResultCode.BAD_REQUEST);
         }
 
         RefAsync<int> totalNumber = 0;
@@ -303,7 +303,7 @@ public class ProductService(
         if (product == null)
         {
             logger.LogWarning("未找到要更新状态的商品，ID: {Id}", id);
-            throw new BusinessException("商品不存在", 404);
+            throw new BusinessException("商品不存在", ResultCode.NOT_FOUND);
         }
 
         product.Status = product.Status == (int)ProductStatusEnum.OnSale
@@ -316,7 +316,7 @@ public class ProductService(
         if (!result)
         {
             logger.LogError("商品状态更新失败，ID: {Id}", id);
-            throw new BusinessException("更新商品状态失败", 500);
+            throw new BusinessException("更新商品状态失败", ResultCode.GLOBAL_ERROR);
         }
 
         logger.LogInformation("商品上下架状态更新成功，ID: {Id}, SaleStatus: {SaleStatus}", id, product.Status);