feat: endpoint to list users by institutional role #162
Description
Summary
No endpoint currently exists to retrieve users filtered by institutional role (e.g., list all chairpersons, list all deans, or list users managed under a specific role holder).
The UserInstitutionalRole entity stores these mappings, but the admin module only exposes POST and DELETE — there is no read endpoint.
Proposed
Add a GET /admin/institutional-roles (or similar) endpoint that allows:
- Super admins to list all institutional role assignments
- Deans to list chairpersons under their scope
- Optional filtering by role type (
DEAN,CHAIRPERSON)
Related
UserInstitutionalRoleentityAdminService(existing assign/remove methods)ScopeResolverService(for role-scoped filtering)