fix: 修复ProductController中saveCategoryAttributes参数类型为CategoryAttribute

src/main/java/com/example/building/service/impl/CategoryAttributeServiceImpl.java

@@ -48,13 +48,6 @@ public class CategoryAttributeServiceImpl implements CategoryAttributeService {
                 attr.setCategoryId(categoryId);
                 attr.setSortOrder(i);
                 
-                // 处理 required 字段类型（前端可能是 Boolean，后端存 Integer）
-                if (attr.getRequired() != null) {
-                    if (attr.getRequired() instanceof Boolean) {
-                        attr.setRequired(((Boolean) attr.getRequired()) ? 1 : 0);
-                    }
-                }
-                
                 System.out.println("  attr: " + attr.getName() + ", type=" + attr.getAttrType() + ", unit=" + attr.getUnit());
                 categoryAttributeMapper.insert(attr);
             }