Étape 1 : squelette du projet

- Monorepo backend/ + frontend/ + deploy/
- Backend FastAPI/SQLModel/Alembic/uv qui démarre (health check, config,
  i18n, base de test PostgreSQL, pytest)
- docker-compose de développement (db + backend hot-reload)
- Chaîne CI/CD GitHub Actions : lint + tests, build image, push GHCR,
  déploiement SSH sur le VPS à chaque push main
- CLAUDE.md : vocabulaire du domaine, conventions, commandes

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017uUsRg7XzopkCPWimwg9ZM

backend/app/api/health.py

@@ -0,0 +1,19 @@
+from fastapi import APIRouter
+from sqlalchemy import text
+
+from app.db import engine
+from app.i18n import t
+
+router = APIRouter(tags=["health"])
+
+
+@router.get("/health")
+def health() -> dict[str, str]:
+    return {"status": "ok", "message": t("health.ok")}
+
+
+@router.get("/health/db")
+def health_db() -> dict[str, str]:
+    with engine.connect() as conn:
+        conn.execute(text("SELECT 1"))
+    return {"status": "ok"}