"Explain"ing a query with binary operator like: ``` demo_num_cpus and demo_num_cpus ``` breaks the frontend, both: * for locally running and hosted (demo.promlens.com) promlens * for firefox and chrome Console error in firefox is `invalid binop`: <img width="594" alt="image" src="https://github.com/prometheus/promlens/assets/516298/83332097-8dbe-413c-adea-d82fafa5e42a">