Rename new_charge and updated_charge to sudden_charge and delayed_charge
We've had some confusion around the names "new_charge" and "updated_charge". We've decided to rename them.
new_charge -> sudden_charge
updated_charge -> delayed_charge
"sudden_charge" indicates that the charge must be addressed before proceeding. Apps should pause services while the merchant is presented with and approves the charge. We use this for new accounts.
"delayed_charge" indicates that there is a charge that must be addressed, but there is a grace period before services are turned off. Apps should continue to work normally in this state and should present the merchant with a notice about the pending charge. After a configurable amount of time of non-payment, this will transition to the delinquent states.