Update purl value

to be consistent with the old schema and hold the purl's persistent, use the record-identifier with 'PPN' for the PURL

indexer/index/elasticsearch.go

@@ -1747,7 +1747,8 @@ func getESLogFromDiv(
 			esLog.Purl = fmt.Sprintf(config.PurlURI, dmdsec.RecordInfo.Recordidentifier.Value)
 		} else {
 			if isFirst {
-				esLog.Purl = fmt.Sprintf(config.PurlURI, workID)
+				//esLog.Purl = fmt.Sprintf(config.PurlURI, workID)
+				esLog.Purl = fmt.Sprintf(config.PurlURI, esLog.RecordIdentifier)
 			} else {
 				esLog.Purl = fmt.Sprintf(config.PurlURI, esLog.ID)
 			}