@Override
    public String factoryIdentifier() {
        return IDENTIFIER;
    }
Format factory for providing configured instances of Canal JSON to RowData {@link
DeserializationSchema}.
Different from flink:1.13.5.This can sink metadata.
inlong-sort/sort-formats/format-row/format-json-v1.18/src/main/java/org/apache/inlong/sort/formats/json/canal/CanalJsonEnhancedFormatFactory.java