User Organization User Role Destroy

GET/PATCH/DELETE /api/users/member/<id>/ Retrieve, update, or delete organization member role. Permission (via ObjectOwnershipMixin config in SuperAdminMixin): - User can GET their OWN role (read-only) - Org Admin can GET/PATCH/DELETE any role in org - Superadmin: same as regular user (org-scoped, not cross-org) Note: Member management is intentionally org-scoped even for superadmins. Writes are admin-only. Every writable field on OrganizationUserRole (role, permissions_override, pending, ...) is privilege-defining, so a member must NOT be able to PATCH their own row — that is direct self-escalation to admin/owner. ``is_requiring_org_admin_for_write`` enforces org-admin for any write while still letting members GET their own role. Role changes go through this admin-gated path (the serializer keeps fields writable for that flow); members have no legitimate self-write field here.