fix repeatable migrations

db/routines/R__041_fn_planning_interval_at_offset.sql

@@ -0,0 +1,45 @@
+-- jeden řádek planning_interval jako jsonb pro aktivní plán a slot offset (Prague 15min)
+
+create or replace function ems.fn_planning_interval_at_offset(
+  p_site_id int,
+  p_offset_slots int default 0
+)
+returns jsonb
+language sql
+stable
+as $fn$
+  select to_jsonb(pi)
+  from ems.planning_interval pi
+  join ems.planning_run pr on pr.id = pi.run_id
+  where pr.site_id = p_site_id
+    and pr.status = 'active'
+    and pi.interval_start = ems.fn_planning_slot_boundary_prague(p_offset_slots)
+  limit 1;
+$fn$;
+
+create or replace function ems.fn_planning_max_effective_charge_w(p_site_id int)
+returns int
+language sql
+stable
+as $fn$
+  select coalesce(
+    least(
+      coalesce(ai.max_battery_charge_w, ai.max_charge_power_w),
+      coalesce(
+        ab.bms_max_charge_w,
+        case when ab.max_charge_c_rate is not null
+          then (ab.max_charge_c_rate * ab.usable_capacity_wh)::bigint
+        end,
+        coalesce(ai.max_battery_charge_w, ai.max_charge_power_w)
+      )
+    )::int,
+    0
+  )
+  from ems.asset_battery ab
+  join ems.asset_inverter ai on ai.id = ab.inverter_id and ai.site_id = ab.site_id
+  where ab.site_id = p_site_id
+    and ai.controllable is true
+    and ai.active is true
+  order by ab.id
+  limit 1;
+$fn$;