tsreaper

[core] Update possible reasons for commit conflicts

1

### Purpose We recently found that, if data is written into expired partitions, commit conflicts may occur. It is not easy to completely work around this scenario, so currently we...

### Purpose Currently Paimon writer operators in Flink have states, which record the `commitUser` (for all writers) and the list of active buckets (for lookup or full-compaction changelog producer). These...

[flink] Small changelog files can now be compacted into big files

2

### Purpose Currently, changelog files are not compacted. If Flink's checkpoint interval is short (for example, 30 seconds) and the number of buckets is large, each snapshot may produce lots...