KIP-1219 — Configurations for KRaft Fetch and FetchSnapshot Byte Size

Accepted Kafka 4.3 KRaftProtocol

Introduces two new KRaft configs — controller.quorum.fetch.max.bytes and controller.quorum.snapshot.max.bytes — to control the maximum bytes per Fetch and FetchSnapshot request respectively. New controllers joining a cluster with slow network links could get stuck cycling between Unattached/Follower/Prospective because the 8MiB default snapshot byte limit prevented completing a FetchSnapshot within fetch.timeout.ms, repeatedly triggering unnecessary elections.

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