sql first refactor

db/routines/R__fn_planning_future_price_days.sql

@@ -0,0 +1,14 @@
+create or replace function ems.fn_planning_future_price_days()
+returns int
+language sql
+stable
+as $fn$
+  select count(distinct (mip.interval_start at time zone 'Europe/Prague')::date)::int
+  from ems.market_interval_price mip
+  where mip.market_source in ('OTE_CZ', 'OTE_CZ_DAM')
+    and mip.interval_start >= now()
+    and mip.interval_start < now() + interval '48 hours';
+$fn$;
+
+comment on function ems.fn_planning_future_price_days() is
+  'Počet kalendářních dní s OTE daty v okně now..now+48h (před spuštěním plánu).';