Allow Integration with ChatGPT Ads to Use Standard Conversion Actions

ChatGPT Ads documentation states that campaigns are only able to optimize towards their standard conversion actions. 

However CallRail is hardcoded to send events a custom conversion actions (i.e. cr_call for calls).

It would be greatly beneficial to the performance of ChatGPT Ads campaigns if the CallRail integration setup included an option to map events to standard conversion actions.