HIPAA-Compliant Patient Record Anonymization Pipeline

Design a Node.js database transformation script that automatically anonymizes patient records while preserving medical research utility. The solution must use advanced encryption techniques to replace personally identifiable information (PII) with cryptographically secure tokens, ensuring HIPAA compliance. Implement a reversible anonymization strategy that allows authorized researchers to re-identify patients if needed, using a secure key management system. Include robust error handling for different data types and demonstrate how the script handles edge cases like partial records or inconsistent data schemas.