third version before modbus cleanup

db/views/R__vw_baseline_load_forecast_accuracy.sql

@@ -0,0 +1,12 @@
+CREATE OR REPLACE VIEW ems.vw_baseline_load_forecast_accuracy_daily AS
+SELECT
+    site_id,
+    date_trunc('day', interval_start AT TIME ZONE 'Europe/Prague') AS day_prague,
+    COUNT(*) AS slot_count,
+    AVG(ABS(error_w))::NUMERIC(12,2) AS mae_w,
+    AVG(error_pct) FILTER (WHERE error_pct IS NOT NULL)::NUMERIC(8,4) AS avg_error_pct
+FROM ems.baseline_load_forecast_accuracy
+GROUP BY site_id, date_trunc('day', interval_start AT TIME ZONE 'Europe/Prague');
+
+COMMENT ON VIEW ems.vw_baseline_load_forecast_accuracy_daily IS
+'Denní souhrn přesnosti predikce bazální spotřeby (|chyba| v průměru W).';