Add product field AI fill and long-lived media cache headers.

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

src/storage/s3-storage.driver.ts

@@ -46,6 +46,8 @@ export class S3StorageDriver {
         Key: key,
         Body: input.body,
         ContentType: input.contentType,
+        // Stable public media URLs — let browsers/CDN cache aggressively.
+        CacheControl: 'public, max-age=31536000, immutable',
       }),
     );