fix: fixed .save repository method not returning generated uuids for …

[ArsenyYankovsky]

…erated uuids for aurora driver

Description of change

Fixed an issue related to aurora-postgres driver described here

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply prettier formatting
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits follow conventions explained in CONTRIBUTING.md

[pleerock]

Thank you!