NOISSUE - Removed unique constraint role_members_unique_entity_member_constraint on (member_id, entity_id).

[SammyOina]

What type of PR is this?

This is a refactor on role and member relationships

What does this do?

• Refined the role management system to allow for more versatile associations between members and entities. This improvement enhances overall flexibility and creates a more dynamic experience for managing roles.
• These backend revisions are designed to support a robust approach, ensuring stability and scalability for role-based functionalities across the platform.

Which issue(s) does this PR fix/relate to?

Have you included tests for your changes?

Did you document any new/modified feature?

Notes