Phase 1 stub — country article (depth 4)

feuilles-moringa-tension-arterielle

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/hypertension/plantes-tension/feuilles-moringa-tension-arterielle",
  "country_code": "ci",
  "pillar_id": "hypertension",
  "sub_hub": "plantes-tension",
  "article_slug": "feuilles-moringa-tension-arterielle"
}