Prompt

Design a scalable event-driven architecture for complex business workflows:

**Architecture Components:**
1. Event bus selection (Kafka, RabbitMQ, AWS EventBridge)
2. Event schema registry
3. Event sourcing patterns
4. Saga pattern implementation
5. Dead letter queue handling

**Event Design:**
- Event naming conventions
- Payload structure standards
- Versioning strategies
- Idempotency guarantees
- Ordering guarantees

**Implementation Guide:**
- Producer best practices
- Consumer patterns
- Error handling strategies
- Monitoring and tracing
- Testing approaches

Business requirements: {INSERT REQUIREMENTS}