Move /api/cms/user and /api/skydive/applications to a new /api/auth domain.
Users and API key applications are identity/access concerns, not CMS or
skydive content. The auth domain provides a clear boundary for future
middleware hardening (rate limiting, audit logging, etc).
docs: add ADR 0014
Product and products routes were sitting under /api/cms but conceptually
belong to a separate e-commerce domain. Split them out into a dedicated
ecommerce subrouter mounted at /api/ecommerce.
julien
Rampeur