add health endpoint for gateway and everos

core/api.py

@@ -66,6 +66,30 @@ def create_app(
         if not service.authenticate_user(user_id, user_key):
             raise HTTPException(status_code=401, detail="invalid user credentials")
 
+    @router.get("/health")
+    async def health() -> dict[str, Any]:
+        try:
+            everos_health = await client.health_check()
+        except Exception as exc:
+            return {
+                "status": "degraded",
+                "api": {"status": "ok"},
+                "everos": {
+                    "status": "unavailable",
+                    "base_url": cfg.everos_base_url,
+                    "error": str(exc),
+                },
+            }
+        return {
+            "status": "ok",
+            "api": {"status": "ok"},
+            "everos": {
+                "status": "ok",
+                "base_url": cfg.everos_base_url,
+                "data": everos_health,
+            },
+        }
+
     @router.post("/users")
     async def create_user(request: UserCreateRequest) -> dict[str, Any]:
         return service.create_user(request.user_id)