Ability to view and search by album UPC

Currently, album objects are missing UPC data. The API only provides globalAsin and localAsin which are not useful in most real-world use cases for applications and stakeholders operating in the music industry. Applications and businesses that operate in music distribution, data reporting, and marketing all rely on UPCs as a single source of truth for a given product. Having the ability to both view the UPC on a given album and also search albums by UPC is essential for being able to effectively work with the API. Please consider including UPC support in the search endpoint and album objects.