fix(seo): set og:type=product on product detail pages

SeoPDPV2 was inheriting og:type from site-level config (usually "website").
Adds "product" to OGType union and explicitly sets type="product" in the
SeoPDPV2 loader so PDPs emit the correct Open Graph type.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: igoramf

commerce/sections/Seo/SeoPDPV2.tsx

@@ -75,6 +75,7 @@ export function loader(_props: Props, _req: Request, ctx: AppContext) {
     canonical,
     noIndexing,
     jsonLDs,
+    type: "product" as const,
   };
 }
 

website/components/Seo.tsx

@@ -7,7 +7,7 @@ export const renderTemplateString = (template: string, value: string) =>
   template.replace("%s", value);
 
 export type SEOSection = JSX.Element;
-export type OGType = "website" | "article";
+export type OGType = "website" | "article" | "product";
 
 export interface Props {
   title?: string;