Event Sourcing over CRUD for Audit Trails

The team decided to move from standard CRUD in PostgreSQL to Event Sourcing with an immutable event log (Kafka) to satisfy compliance requirements for audit trails. Database triggers were considered as an alternative but rejected because they lose business context. Key files: src/services/transactionService.ts (event producers), src/events/eventStore.ts (consumer/store). Reference: Martin Fowler Event Sourcing Pattern article.