I'm interest on the implementation details.
1. where is the partition to bundle mapping stored？when upgrade origin logic to the new round robin logic. how the current code distinguish partition assigned by origin logic and the new created topic assign by round robin logic. 2. can you explain how the re-assignment works （when bundle number change）. which component will trigger and do the work ? 3. If bundle-split is not expected. how many bundle should user set. and do we need disable bundle split we the round robin logic applied.
