sql first refactor

db/routines/R__fn_economics_unlock_day.sql

@@ -0,0 +1,15 @@
+create or replace function ems.fn_economics_unlock_day(p_site_id int, p_day date)
+returns jsonb
+language plpgsql
+as $fn$
+begin
+  delete from ems.audit_day_lock
+  where site_id = p_site_id
+    and day_local = p_day;
+
+  return jsonb_build_object('locked', false, 'day', p_day);
+end;
+$fn$;
+
+comment on function ems.fn_economics_unlock_day(int, date) is
+  'Odebere zámek dne ekonomiky (DELETE lock).';