The user-provided name for this Product. Must not be empty.
Must be at most 4096 characters long.
The category for the product identified by the reference
image. This should be either "homegoods-v2", "apparel-v2", or
"toys-v2". The legacy categories "homegoods", "apparel", and
"toys" are still supported but will be deprecated. For new
products, please use "homegoods-v2", "apparel-v2", or
"toys-v2" for better product search accuracy. It is
recommended to migrate existing products to these categories
as well. This field is immutable.