TS - Add missing values on measurements graph endpoint return
Was created the issue Fronend #9 on frontend repository, but the changes can't implemented in front because exists a feature on backend that filter the measurement by LTTB !28 (merged) algorithm that reduce the measurements points that can make the insertion of missing values in measurements after the LTTB filter cause a unexpected behavior on graph measurements. Therefore was decided migrate the insertion of missing values algorithm to backend repository.