Use native `UUID` type for UUID colums

[sahibamittal]

Description

Replace UUID columns type from VARCHAR to Postgres native UUID.

Addressed Issue

Closes https://github.com/DependencyTrack/hyades/issues/1417

Checklist

• [x] I have read and understand the contributing guidelines
• [ ] This PR fixes a defect, and I have provided tests to verify that the fix is effective
• [ ] This PR implements an enhancement, and I have provided tests to verify that it works as intended
• [x] This PR introduces changes to the database model, and I have updated the migration changelog accordingly
• [ ] This PR introduces new or alters existing behavior, and I have updated the documentation accordingly