RYZE Forge CDN — serves generated artifacts.
Route shapes:
  /artifacts/<id>/preview/<file>      (html, js, mjs, css, json, map, svg, png, jpg, jpeg, webp, gif, avif, woff2)
  /artifacts/<id>/metadata.json
  /<slug>/<artifactId>.html
  /sections/<id>/{snapshot.html,source.tar.gz,metadata.json}
  /fonts/<name>.woff2
  /styles/<name>.css
  /runtime/<name>.js