feat: add product detail enrichment for Magnit products

- Add isDetailsFetched field to Product model
- Add fetchProductDetails() and fetchProductObjectInfo() methods to MagnitApiScraper
- Add ProductParser methods for detail parsing
- Add ProductService methods: getProductsNeedingDetails(), updateProductDetails(), markAsDetailsFetched()
- Add enrich-product-details.ts script with statistics tracking
- Update package.json with "enrich" script command
- Add E2E_GUIDE.md documentation
- Exclude debug scripts from tsconfig type-check (temporary)

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

package.json

@@ -8,7 +8,9 @@
     "build": "tsc",
     "type-check": "tsc --noEmit",
     "dev": "tsx src/scripts/scrape-magnit-products.ts",
+    "enrich": "tsx src/scripts/enrich-product-details.ts",
     "test-db": "tsx src/scripts/test-db-connection.ts",
+    "test-detail-endpoint": "tsx src/scripts/test-all-detail-endpoints.ts",
     "prisma:generate": "prisma generate",
     "prisma:migrate": "prisma migrate dev",
     "prisma:studio": "prisma studio --config=prisma.config.ts",