fix: health endpoint utilise request.app.version au lieu de version hardcodée

app/routers/api.py

@@ -39,7 +39,7 @@ def _check_rate_limit(request: Request) -> bool:
 
 
 @router.get("/health")
-async def health():
+async def health(request: Request):
     """Health check: DB + Gitea connectivity."""
     db_ok = False
     gitea_ok = False
@@ -57,7 +57,7 @@ async def health():
 
     return {
         "status": "ok" if (db_ok and gitea_ok) else "degraded",
-        "version": "2.1.0",
+        "version": request.app.version,
         "db": db_ok,
         "gitea": gitea_ok,
     }