fix(health): 补全 reportFormat 字段到 Payload DTO 和 HealthReport 实体，修复编译失败

cfc-backend/src/main/java/com/etotem/cfc/entity/HealthReport.java

@@ -80,7 +80,6 @@ public class HealthReport implements Serializable {
     /** 报告文件URL */
     private String fileUrl;
 
-    /** 报告格式: pdf / image 等 */
     private String reportFormat;
 
     /** 状态: active/archived */