High-level Amazon DocumentDB (MongoDB-compatible) cluster builder following AWS best practices. **Default Settings:** - Engine = docdb - Instance class = db.t3.medium - Instances = 1 (single instance for dev) - Port = 27017 (MongoDB default) - Backup retention = 7 days - Preferred backup window = 03:00-04:00 UTC - Encryption at rest = enabled - Deletion protection = disabled (for dev) **Rationale:** These defaults follow AWS Well-Architected Framework: - MongoDB compatibility for easy migration from Cosmos DB - T3.medium suitable for development and testing - Encryption enabled by default for security - Single instance reduces costs for non-production **Use Cases:** - Document database applications - Content management systems - User profiles and catalogs - Mobile and web applications - Migration from MongoDB or Cosmos DB **Escape Hatch:** Access the underlying CDK DatabaseCluster via the `Cluster` property for advanced scenarios not covered by this builder.