Changes to Create Order Group

removed the optional property service from the response with the 400 status

removed the optional property service from the response with the 401 status

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

the subaccount request property default value 0 was removed

added the new optional request property exchange_index

added the optional property exchange_index to the response with the 201 status

added the required property subaccount to the response with the 201 status

added the new optional request property subaccount

added the new optional request property contracts_limit_fp

the request property contracts_limit became optional

api tag order-groups added

api tag portfolio removed

the response property order_group_id became required for the status 201

the request property contracts_limit became required

the contracts_limit request property format changed from no format to int64

the endpoint scheme security kalshiAccessKey AND kalshiAccessSignature AND kalshiAccessTimestamp was added to the API

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 500