Add stable keys for special groups and SSL sync agent hooks.

English keys on store/website specials stay unique per business; domain-admin can trigger dashboard SSL sync.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/products/products.service.ts

@@ -528,6 +528,7 @@ export class ProductsService {
       status: product.status,
       categoryId: categoryAssignment?.categoryId.toString() ?? null,
       categoryName: categoryAssignment?.category.name ?? '',
+      categoryNameFa: categoryAssignment?.category.nameFa ?? '',
       brandId: product.brandId?.toString() ?? null,
       brand: this.brands.serializeBrandSummary(product.brand),
       tags: Array.isArray(metadata.tags)