KIP-170 — Enhanced TopicCreatePolicy and introduction of TopicDeletePolicy

Discussion AdminBroker

Extends the CreateTopicPolicy (KIP-108) with cluster metadata access and introduces a DeleteTopicPolicy interface, plus a new DeleteTopicRequest version with a verification-only flag. Operators needed to validate topic deletion against external registries or resource constraints (e.g., in-use topics) but had no server-side hook to do so.

Details