fix repeatable migrations

db/routines/R__002_fn_modbus_last_verified_map.sql

@@ -0,0 +1,24 @@
+-- map register -> value_verified z modbus_command (poslední verified řádek per register)
+
+create or replace function ems.fn_modbus_last_verified_map(
+  p_site_id int,
+  p_asset_id int
+)
+returns jsonb
+language sql
+stable
+as $fn$
+  select coalesce(
+    jsonb_object_agg(register::text, to_jsonb(value_verified)),
+    '{}'::jsonb
+  )
+  from (
+    select
+      v.register,
+      v.value_verified
+    from ems.vw_modbus_last_verified v
+    where v.site_id = p_site_id
+      and v.asset_type = 'inverter'
+      and v.asset_id = p_asset_id
+  ) t;
+$fn$;