Add parentNodeId field to WorkflowMessage (#233)

* Add parentNodeId field to WorkflowMessage

The workflow streaming API now returns parent_node_id to indicate
parent-child relationships between workflow nodes.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* Bump version to 2.22.23

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: zhansheng.lzs <zhansheng.lzs@alibaba-inc.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: 3 people

pom.xml

@@ -40,7 +40,7 @@
     <name>DashScope Java SDK</name>
     <groupId>com.alibaba</groupId>
     <artifactId>dashscope-sdk-java</artifactId>
-    <version>2.22.22</version>
+    <version>2.22.23</version>
 
     <properties>
         <maven.compiler.source>8</maven.compiler.source>

src/main/java/com/alibaba/dashscope/app/WorkflowMessage.java

@@ -27,6 +27,9 @@ public class WorkflowMessage {
   @SerializedName("message")
   private Message message;
 
+  @SerializedName("parent_node_id")
+  private String parentNodeId;
+
   @Data
   public static class Message {
     @SerializedName("role")