PR 6: Database migration validation - fresh/upgrade test complete

✅ Database Setup:
- Created PostgreSQL kartselldb with kartsell user
- SSH port forward established (localhost:5432 → 178.104.200.7:5432)

✅ DbMigrator Fixes:
- Fixed migration path discovery (AppContext.BaseDirectory fallback)
- Added empty variable dictionary to suppress DbUp preprocessing
- Fixed PostgreSQL dollar quoting conflict ($policy$ → $$)

✅ Migration Results:
- All 21 migrations executed successfully
- Schema versions journal created and tracked
- 21 scripts processed in order, no rollback needed

Status: FRESH DATABASE DEPLOYMENT SUCCESSFUL
- kartselldb fully initialized with v16 schema
- Ready for application startup

Next: Deploy application and run integration tests

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

frontend/src/shared/ui/components/KsMultiSelect.vue.js

@@ -0,0 +1,45 @@
+import { useUiAdapter } from '../adapter/useUiAdapter';
+const __VLS_props = withDefaults(defineProps(), { modelValue: () => [] });
+const emit = defineEmits();
+const adapter = useUiAdapter();
+const __VLS_defaults = { modelValue: () => [] };
+const __VLS_ctx = {
+    ...{},
+    ...{},
+    ...{},
+    ...{},
+    ...{},
+};
+let __VLS_components;
+let __VLS_intrinsics;
+let __VLS_directives;
+const __VLS_0 = (__VLS_ctx.adapter.components.MultiSelect);
+// @ts-ignore
+const __VLS_1 = __VLS_asFunctionalComponent1(__VLS_0, new __VLS_0({
+    ...{ 'onUpdate:modelValue': {} },
+    ...(__VLS_ctx.$props),
+}));
+const __VLS_2 = __VLS_1({
+    ...{ 'onUpdate:modelValue': {} },
+    ...(__VLS_ctx.$props),
+}, ...__VLS_functionalComponentArgsRest(__VLS_1));
+let __VLS_5;
+const __VLS_6 = {
+    /** @type {typeof __VLS_5.'update:modelValue'} */
+    'onUpdate:modelValue': (...[$event]) => {
+        return (__VLS_ctx.emit('update:modelValue', $event));
+        // @ts-ignore
+        [adapter, $props, emit,];
+    },
+};
+var __VLS_7;
+var __VLS_3;
+var __VLS_4;
+// @ts-ignore
+[];
+const __VLS_export = (await import('vue')).defineComponent({
+    __typeEmits: {},
+    __typeProps: {},
+    props: {},
+});
+export default {};