modify:

1. 增加流程实例编码；

hz-pm-api/src/main/java/com/hz/pm/api/projectdeclared/utils/ProjectDetailDiffUtil.java

@@ -7,6 +7,7 @@ import cn.hutool.core.util.ArrayUtil;
 import cn.hutool.core.util.ObjUtil;
 import lombok.Builder;
 import lombok.Data;
+import org.apache.commons.collections4.MapUtils;
 
 import java.util.*;
 
@@ -47,8 +48,11 @@ public final class ProjectDetailDiffUtil {
      * @return 对比结果
      **/
     public static List<FieldDiff> diff(Object oldObj, Object newObj, boolean diffSame, String... ignores) {
-        Map<String, Object> oldObjMap = BeanUtil.beanToMap(oldObj);
-        Map<String, Object> newObjMap = BeanUtil.beanToMap(newObj);
+        if (oldObj == null && newObj == null) {
+            return Collections.emptyList();
+        }
+        Map<String, Object> oldObjMap = oldObj == null ? Collections.emptyMap() : BeanUtil.beanToMap(oldObj);
+        Map<String, Object> newObjMap = newObj == null ? Collections.emptyMap() : BeanUtil.beanToMap(newObj);
         if (ArrayUtil.isNotEmpty(ignores)) {
             for (String ignore : ignores) {
                 newObjMap.remove(ignore);

hz-pm-api/src/main/java/com/hz/pm/api/projectlib/model/dto/ProjectChangeListDTO.java

@@ -17,6 +17,9 @@ import java.time.LocalDateTime;
 @Data
 public class ProjectChangeListDTO {
 
+    @ApiModelProperty("流程实例ID")
+    private String instCode;
+
     @ApiModelProperty("项目ID")
     private Long projectId;