Energy endpoints no longer returning total_pack_energy and energy_left

[tomhollander]

Today the /products and /energy_sites/{id}/live_status endpoints stopped returning values for total_pack_energy and energy_left. These are documented in the API and developers should expect them to be returned in every response. Can you please ensure the API is kept stable and any breaking changes are versioned and developers given warning before any deprecations. In the case of these specific values, they are important for owners to understand how their Powerwalls are performing so they should continue to be available.