Faster Variant ID and Barcode-based imports

Following our recent parallel processing update, we’ve extended the same speed improvements to more import scenarios.

🔧 Improvements

• Variant ID imports – Imports using Variant ID [ID] now preload all variant data for faster lookups, just like SKU-based imports.
• Barcode imports – Imports using Variant Barcode [ID] also benefit from preloading, making barcode-based bulk updates faster.
• Progress visibility – During preloading, you’ll see a progress message showing how many variants have been loaded.