Changes to Get NFT metadata

removed the enum value b3 from the path request parameter chain

removed the enum value blast from the path request parameter chain

the response property animation_url became nullable for the status 200

the response property decimals became nullable for the status 200

the response property description became nullable for the status 200

the response property external_link became nullable for the status 200

the response property image became nullable for the status 200

the response property name became nullable for the status 200

the response property traits/items/display_type became nullable for the status 200

the response property traits/items/max_value became nullable for the status 200

added the new enum value stablechain to the path request parameter chain

added the media type */* for the response with the status 400

added the media type */* for the response with the status 404

added the optional property code to the response with the 401 status

added the optional property code to the response with the 403 status

added the optional property code to the response with the 409 status