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/vite.config.js

@@ -0,0 +1,8 @@
+import { fileURLToPath, URL } from 'node:url';
+import { defineConfig } from 'vite';
+import vue from '@vitejs/plugin-vue';
+export default defineConfig({
+    plugins: [vue()],
+    resolve: { alias: { '@': fileURLToPath(new URL('./src', import.meta.url)) } },
+    server: { proxy: { '/api': 'http://localhost:5000' } }
+});