fix: product variation master facet selection does not work for non-s…

…tring filters (#1439, #1449)

* product variations should be selected by checking value equality with same data type

src/app/core/models/product-variation/product-variation.helper.ts

@@ -109,7 +109,7 @@ export class ProductVariationHelper {
             // attribute is not selected
             !selectedFacets.find(([key]) => key === attr.variationAttributeId) ||
             // selection is variation
-            selectedFacets.find(([key, val]) => key === attr.variationAttributeId && val === attr.value)
+            selectedFacets.find(([key, val]) => key === attr.variationAttributeId && val === attr.value.toString())
         )
       ).length;
   }