cdc2a79950
Energy-Charts /public_power now fetched via strommix_history_de CMS collection
(which uses ${time:day_start|iso}/${time:now|iso} in its source URL). When the
CMS returns null (old binary without env_subst support), falls back to a direct
EC call so charts keep working during the transition.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>