c143aec2b5
GRO-156 follow-up: RBAC middleware was blocking groomer/receptionist from GET /api/staff. The QA review found 403 with "role groomer is not permitted" after PR #140 deployment. Fix: split the /staff/* guard — GET requests allow all roles (groomer, receptionist, manager); write operations remain manager-only. Co-Authored-By: Paperclip <noreply@paperclip.ing>