I've noticed that Google Ads call details reporting grays out a lot of fields that can be pulled into the report. For instance, having cost measurements such as spend and cpc would be great in order to determine the ROI on a call. Additionally, the keyword field is available but the actual search term field is not available to report on. Is Google intentionally leaving this out due to privacy policy regulations? Or there is another reason? Would using other call tracking systems such as CallRails be able to tie in cost measurements to a phone call?