Changes to Create a custom contact field

added the non-success response with the status 429

added the new optional request property type

added subschema #1 subschema #2 to the request body anyOf list

the request property contact_field_type_id became optional

request property contact_field_type_id was restricted to a list of enum values

added the new 0abe5601-7738-43c8-858f-81911ecf89ee enum value to the request property contact_field_type_id

added the new e43c6471-b3ff-4541-80c5-964c62decd15 enum value to the request property contact_field_type_id

added the new fe7dd76c-5113-4159-bc7c-0dbf0ed8d404 enum value to the request property contact_field_type_id

endpoint added