public static long getInitialAllocatedFileTimestamp() {
    return Long.MAX_VALUE / 2;
  }
Repair the internal unsorted file by compaction and move it to unSequence space after compaction
whether the source TsFileResource is sequence or not.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/task/RepairUnsortedFileCompactionTask.java