Changes to Get init data for a flow

the response property code became optional for the status 404

the response property code became optional for the status 500

the response property message became optional for the status 404

the response property message became optional for the status 500

the code response's property type changed from string to integer, and format from no format to int32 for status 404

the code response's property type changed from string to integer, and format from no format to int32 for status 500

removed the optional property details from the response with the 404 status

removed the optional property details from the response with the 500 status

added the new bank_account_number enum value to the elements/items/role response property for the response status 200

added the new bic enum value to the elements/items/role response property for the response status 200

added the new clearing_system_id enum value to the elements/items/role response property for the response status 200

added the new iban enum value to the elements/items/role response property for the response status 200