Added serialVersionUID to ClickHousePayload

Author: mzitnik

flink-connector-clickhouse-base/src/main/java/org/apache/flink/connector/clickhouse/data/ClickHousePayload.java

@@ -7,6 +7,7 @@
 
 public class ClickHousePayload implements Serializable {
     private static final Logger LOG = LoggerFactory.getLogger(ClickHousePayload.class);
+    private static final long serialVersionUID = 1L;
 
     private final byte[] payload;
     public ClickHousePayload(byte[] payload) {