@Override
  public void close() throws Exception {
    continuousSplitPlanner.close();
  }
This is a mixed-format table(mixed iceberg, mixed-hive) incremental loader.

<p>This loader is used to load data by the merge on read approach first, then by the incremental
pull approach.

<p>Merge on read approach only contain INSERT rows.

<p>Incremental pull approach contains INSERT, DELETE, UPDATE_BEFORE, and UPDATE_AFTER.

<p>Support projection and filter push-down to speed up the loading process.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/read/MixedIncrementalLoader.java