Event Sourcing over CRUD for Audit Trails

Decided to implement Event Sourcing over traditional CRUD for financial transaction audit trails. The current CRUD approach in PostgreSQL loses business context on updates. Alternatives considered: 1) Database triggers with a history_logs table - rejected because triggers only capture row-level changes without business context. 2) Event Sourcing - chosen because it stores immutable domain events capturing full context. Implementation: Kafka for the immutable event log, Postgres materialized view for fast reads. Reference: Martin Fowler Event Sourcing Pattern. Files: src/services/transactionService.ts, src/events/eventStore.ts.