Add local product detail page with Dutchie comparison

- Add ProductDetail page for viewing products locally
- Add Dutchie and Details buttons to product cards in Products and StoreDetail pages
- Add Last Updated display showing data freshness
- Add parallel scrape scripts and routes
- Add K8s deployment configurations
- Add frontend Dockerfile with nginx

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/src/services/scheduler.ts

@@ -13,8 +13,8 @@ async function getSettings(): Promise<{
     WHERE key IN ('scrape_interval_hours', 'scrape_specials_time')
   `);
   
-  const settings: any = {};
-  result.rows.forEach(row => {
+  const settings: Record<string, string> = {};
+  result.rows.forEach((row: { key: string; value: string }) => {
     settings[row.key] = row.value;
   });