Add tariff_dkk + total_dkk to elprice

Each hourly row now carries the N1 time-of-use tariff (øre/kWh × 10
to match the DKK/MWh unit of price_dkk) and the combined consumer
price (spot + tariff). Existing rows are backfilled in the migration
with a CASE expression mirroring tariffs/tariff-for-hour; new writes
compute it in the controller. API response exposes both fields.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

resources/queries.sql

@@ -67,14 +67,16 @@ VALUES (:time-start, :hour, :kwh)
 ON CONFLICT (time_start, hour) DO NOTHING;
 
 -- :name insert-elprice! :! :n
--- :doc Insert an hourly el-price row; keep first value on conflict
-INSERT INTO elprice (time_dk, price_area, price_dkk)
-VALUES (:time-dk, :price-area, :price-dkk)
-ON CONFLICT (time_dk, price_area) DO NOTHING;
+-- :doc Upsert an hourly el-price row; refresh tariff/total on conflict
+INSERT INTO elprice (time_dk, price_area, price_dkk, tariff_dkk, total_dkk)
+VALUES (:time-dk, :price-area, :price-dkk, :tariff-dkk, :total-dkk)
+ON CONFLICT (time_dk, price_area) DO UPDATE SET
+  tariff_dkk = EXCLUDED.tariff_dkk,
+  total_dkk  = EXCLUDED.total_dkk;
 
 -- :name get-elprice-for-date :? :*
 -- :doc Hourly prices for a DK local date, both areas
-SELECT time_dk, price_area, price_dkk
+SELECT time_dk, price_area, price_dkk, tariff_dkk, total_dkk
 FROM elprice
 WHERE time_dk::date = :date
 ORDER BY time_dk, price_area;