Amazon DocumentDB now supports engine minor version starting with 5.0.1

Summary

• Adds support for engine minor version 5.0.1 with new aggregation operators ($rand, $pow, $dateToParts, $dateFromParts).
• Introduces active connections metric and granular command‑level performance metrics (find, insert, update, etc.) in CloudWatch.
• Allows creating or upgrading clusters to 5.0.1; upgrades are one‑way and move off the LTS track.