Serverless Compliance Monitoring Data Pipeline

Build a serverless compliance monitoring system using AWS Lambda, Step Functions, and Python that automatically processes financial regulatory documents, extracts key compliance metrics, and generates real-time risk assessments. Create a robust event-driven architecture that can handle complex regulatory ingestion from multiple sources, implement machine learning-based anomaly detection, and automatically generate compliance reports. Include comprehensive error handling, retry mechanisms, and a dead-letter queue for unprocessed documents.