How we improved DNS record build speed by more than 4,000x

Introduced a per-record build type for the DNS Zone Builder, complementing the existing full build type. This involved creating a new Kafka event pipeline for record changes, separating the Zone Builder into distinct scheduler types (full and per-record), implementing a new Quicksilver interface for the per-record scheduler, and ensuring locking between schedulers to prevent stale data overwrites. Addressed a bug where record name changes led to stale records in Quicksilver by treating updates as separate create and delete events. This resulted in a 150x average improvement in build times and a 4250x improvement for large zones.