Changes to Add a separate subscription account [write]

added the new meta enum value to the modelSubscription/provider response property for the response status 201

added the new org_disabled enum value to the modelSubscription/status response property for the response status 201

added the new xai enum value to the modelSubscription/provider response property for the response status 201

added the new meta enum value to the request property provider

added the new xai enum value to the request property provider

added the optional property error/request_id to the response with the default status

the response property error became required for the status default

the response property error/code became required for the status default

the response property error/message became required for the status default