fix ranniho neprodeje do site

db/migration/V078__planning_interval_export.sql

@@ -0,0 +1,10 @@
+-- export_mode / export_limit_w z LP — potřeba pro control exporter (reg 142/143)
+
+alter table ems.planning_interval
+  add column if not exists export_mode text,
+  add column if not exists export_limit_w int;
+
+comment on column ems.planning_interval.export_mode is
+  'Záměr exportu z solveru: NONE / PV_SURPLUS / BATTERY_SELL.';
+comment on column ems.planning_interval.export_limit_w is
+  'Tvrdý limit exportu do sítě (W) v slotu; 0 = bez exportu.';