CDC at Scale: Patterns & Pitfalls

Outbox pattern, ordering, schema evolution, DLQ/replay, exactly-once sinks, and GDPR erasure for CDC.

The hard half of CDC — the outbox pattern, dual-write hazards, schema evolution propagation, ordering and per-key guarantees, dead letter queues and replay, exactly-once into lakehouse sinks, and GDPR erasure propagation across a streaming pipeline.