add outputinfo to status interface for startScan

Author: tony-xlh

_articles/info/api/interfaces.md

@@ -565,10 +565,13 @@ interface Status {
     event?: string;
     result?: {
         currentPageNum?: number;
+        outputInfo?:OutputInfo; 
     };
 }
 ```
 
+[`OutputInfo`](/_articles/info/api/interfaces.md#outputinfo) is only returned for `postTransfer` event.
+
 ### TiffTag
 
 **Syntax**