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/adapter/native/NativeNumberFieldAdapter.vue.js

@@ -0,0 +1,43 @@
+const __VLS_props = defineProps();
+const emit = defineEmits();
+function parse(raw) { if (raw.trim() === '')
+    return null; const value = Number(raw); return Number.isFinite(value) ? value : null; }
+const __VLS_ctx = {
+    ...{},
+    ...{},
+    ...{},
+    ...{},
+    ...{},
+};
+let __VLS_components;
+let __VLS_intrinsics;
+let __VLS_directives;
+__VLS_asFunctionalElement1(__VLS_intrinsics.input)({
+    ...{ onInput: (...[$event]) => {
+            return (__VLS_ctx.emit('update:modelValue', __VLS_ctx.parse($event.target.value)));
+            // @ts-ignore
+            [emit, parse,];
+        } },
+    ...{ onBlur: (...[$event]) => {
+            return (__VLS_ctx.emit('blur', $event));
+            // @ts-ignore
+            [emit,];
+        } },
+    id: (__VLS_ctx.inputId),
+    ...{ class: "ks-native-input" },
+    type: "number",
+    value: (__VLS_ctx.modelValue ?? ''),
+    disabled: (__VLS_ctx.disabled),
+    'aria-invalid': (__VLS_ctx.invalid || undefined),
+    min: (__VLS_ctx.min),
+    max: (__VLS_ctx.max),
+    step: (__VLS_ctx.maxFractionDigits ? 1 / 10 ** __VLS_ctx.maxFractionDigits : 1),
+});
+/** @type {__VLS_StyleScopedClasses['ks-native-input']} */ ;
+// @ts-ignore
+[inputId, modelValue, disabled, invalid, min, max, maxFractionDigits, maxFractionDigits,];
+const __VLS_export = (await import('vue')).defineComponent({
+    __typeEmits: {},
+    __typeProps: {},
+});
+export default {};