feat: add workspaceId and reason fields to LiveTypeDTO for enhanced session management

sample/src/main/java/com/dji/sample/manage/model/dto/LiveTypeDTO.java

@@ -31,6 +31,12 @@ public class LiveTypeDTO {
     @JsonProperty("camera_position")
     private CameraPositionEnum cameraPosition;
 
+    @JsonProperty("workspace_id")
+    private String workspaceId;
+
+    /** manual / stalled / interrupted / device_error */
+    private String reason;
+
     /**
      * 观看会话ID，由服务端在 liveStart 时生成（UUID），前端在 heartbeat/stop 时回传。
      */