CVE-2026-55478: Snipe-IT has missing object-level authorization in Kits API

The API endpoint for adding a license to a predefined kit (POST /api/v1/kits/{kit_id}/licenses) only checks whether the caller can edit kits, but does not perform object-level authorization on the referenced license itself. Because of this, a low-privilege user with only predefined-kit permissions can still bind a license that they should not be allowed to access or manage into a kit.