fix: 增加日志排查保存属性问题

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

@@ -30,6 +30,13 @@ public class CategoryAttributeServiceImpl implements CategoryAttributeService {
     @Override
     @Transactional
     public void saveAttributes(String categoryId, List<CategoryAttribute> attrs) {
+        System.out.println("=== saveAttributes called ===");
+        System.out.println("categoryId: " + categoryId);
+        System.out.println("attrs size: " + (attrs != null ? attrs.size() : 0));
+        if (attrs != null) {
+            attrs.forEach(a -> System.out.println("  attr: " + a.getName() + ", type=" + a.getAttrType() + ", unit=" + a.getUnit()));
+        }
+        
         // 删除旧属性
         categoryAttributeMapper.delete(new LambdaQueryWrapper<CategoryAttribute>()
                 .eq(CategoryAttribute::getCategoryId, categoryId));
@@ -44,6 +51,7 @@ public class CategoryAttributeServiceImpl implements CategoryAttributeService {
                 categoryAttributeMapper.insert(attr);
             }
         }
+        System.out.println("=== saveAttributes done ===");
     }
 
     @Override