refactor(pojo): 修正Article类中attributeid字段的列名拼写

feat(controller): 在ArticleController中添加根据属性ID获取文章的方法

style(repository): 在CategoryRepository方法上添加空行提高可读性

chore: 移除MyAfterProjecyApplication中多余的MapperScan注解

src/main/java/com/qf/myafterprojecy/pojo/Article.java

@@ -22,7 +22,7 @@ public class Article {
     private String content;
 
     @NotNull(message = "类别id不能为空")
-    @Column(name = "attributeid")
+    @Column(name = "attribute_id")
     private Integer attributeid;
 
     @Column(name = "img")