Phase 1 stub — country article (depth 4)

shilajit-bienfaits-composition-utilisation

Article rendering layer coming in Phase 3 (will reuse the existing article component, parameterized by country + sub_hub).

{
  "route": "c/[country]/[pillar]/[sub_hub]/[slug]",
  "public_url": "/ci/energie/plantes-energisantes/shilajit-bienfaits-composition-utilisation",
  "country_code": "ci",
  "pillar_id": "energie",
  "sub_hub": "plantes-energisantes",
  "article_slug": "shilajit-bienfaits-composition-utilisation"
}