Integrate Lakekeeper REST catalog in single-node Docker Compose deployment

[mengw15]

Task Summary

Update the single-node Docker Compose deployment (bin/single-node/) to use Lakekeeper as the Iceberg REST catalog instead of the direct Postgres-based JDBC catalog.

Priority

P2 – Medium

Task Type

• Code Implementation
• Documentation
• Refactor / Cleanup
• Testing / QA
• DevOps / Deployment