Changes to Preview migration

added the required property data/companies/items/notes to the response with the 200 status

added the required property data/companies/items/would_fail to the response with the 200 status

the request property company_ids became optional

the request property plan_version_ids_from became optional

added the new required request property plan_version_ids_from

added the required property data/has_billing_changes to the response with the 200 status

endpoint added