Catalogue request approvals: analyst + developer pages (#928/#929) New pair: - Catalogue-Request-Approvals — set up an approver, approve/reject, the requester's dashboard view, who can approve, worked example, limits. - Catalogue-Request-Approvals-Developer-Guide — colour-keyed file table, the gating rule, the auto-raise (promote-to-ticket), the three surfaces, verification, and extension notes (manager routing, board, reasons). Updated Portal-Request-Catalogue: removed the now-false "no approval step" and "promote-to-ticket coming" claims, cross-linked the new pages. Sidebar: added the pair under Forms.