fix repeatable migrations

db/routines/R__035_fn_planning_active_run.sql

@@ -0,0 +1,29 @@
+-- aktivní planning_run pro site (rolling horizon)
+
+create or replace function ems.fn_planning_active_run(p_site_id int)
+returns jsonb
+language sql
+stable
+as $fn$
+  select case
+    when not exists (select 1 from ems.site s where s.id = p_site_id) then
+      jsonb_build_object('error', 'unknown_site')
+    when not exists (
+      select 1 from ems.planning_run pr
+      where pr.site_id = p_site_id and pr.status = 'active'
+    ) then
+      jsonb_build_object('error', 'no_active_plan')
+    else (
+      select jsonb_build_object(
+        'id', pr.id,
+        'horizon_end', pr.horizon_end,
+        'horizon_start', pr.horizon_start,
+        'created_at', pr.created_at
+      )
+      from ems.planning_run pr
+      where pr.site_id = p_site_id and pr.status = 'active'
+      order by pr.created_at desc
+      limit 1
+    )
+  end;
+$fn$;