Event Sourcing over CRUD for Audit Trails

The team decided to move from PostgreSQL CRUD to Event Sourcing architecture with Kafka and PostgreSQL materialized views. Instead of storing current state in mutable tables, we store immutable domain events (e.g., TransactionCreated, TransactionApproved, StatusUpdated). Rejected database triggers as they lose business context (e.g., user intent, reason for change). Follows Martin Fowler Event Sourcing Pattern article. Implementation: src/services/transactionService.ts for event producers, src/events/eventStore.ts for consumer/store logic.