添加租户字段，在联系上外键之前暂且设为字符串

src/main/java/org/cmh/backend/NewsManagement/dto/NewsRequest.java

@@ -12,4 +12,5 @@ public class NewsRequest extends JwtRequest {
     private String content;
     private String imagePath;
     private String author;
+    private String tenant;
 }

src/main/java/org/cmh/backend/NewsManagement/model/News.java

@@ -31,4 +31,6 @@ public class News {
 
     @CreationTimestamp
     private LocalDateTime createdAt;
+
+    private String tenant;
 }