Phase 1 stub — country article (depth 4)

curcuma-anti-inflammatoire-guide-pratique

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/digestion-ventre/plantes-digestion/curcuma-anti-inflammatoire-guide-pratique",
  "country_code": "ci",
  "pillar_id": "digestion-ventre",
  "sub_hub": "plantes-digestion",
  "article_slug": "curcuma-anti-inflammatoire-guide-pratique"
}