[Feat]: Update Role enum #661
Description
Is your feature request related to a problem? Please describe.
The Role enum should be updated to be consistent with the protobuf definitions (similar to #652)
Describe the solution you'd like
Have ROLE_AGENT and ROLE_USER in the domain Role enum and remove their textual representation.
Describe alternatives you've considered
No response
Additional context
No response
Code of Conduct
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