private void addToStreamExt(InlongStreamInfo streamInfo, String value) {
        if (streamInfo.getExtList() == null) {
            streamInfo.setExtList(new ArrayList<>());
        }

        InlongStreamExtInfo extInfo = new InlongStreamExtInfo();
        extInfo.setInlongGroupId(streamInfo.getInlongGroupId());
        extInfo.setInlongStreamId(streamInfo.getInlongStreamId());
        extInfo.setKeyName(InlongConstants.DATAFLOW);
        extInfo.setKeyValue(value);

        streamInfo.getExtList().removeIf(ext -> extInfo.getKeyName().equals(ext.getKeyName()));
        streamInfo.getExtList().add(extInfo);
    }
Add config into inlong stream ext info
inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/resource/sort/SortFlinkConfigOperator.java