@Override
    public void applyReadableMetadata(List<String> metadataKeys) {
        this.metadataKeys = metadataKeys;
    }
{@link DecodingFormat} for Canal using JSON encoding.
different from flink:1.13.5. This support more metadata.
inlong-sort/sort-formats/format-row/format-json-v1.15/src/main/java/org/apache/inlong/sort/formats/json/canal/CanalJsonEnhancedDecodingFormat.java