### Search before asking - [x] I searched in the [issues](https://github.com/apache/fluss-rust/issues) and found nothing similar. ### Description depends on https://github.com/apache/fluss-rust/pull/452 Add subscribe_partition_buckets (single and batch), and unsubscribe_partition on LogScanner. Currently only non-partitioned subscribe is supported. ### Willingness to contribute - [ ] I'm willing to submit a PR!