> I'm about to embark on some months of cold-calling (it will be brutal)

This is something I need to do, have no knowledge about and is definitely going to be harder than building the thing.

> it would be cool to record the calls and feed them to AI for some simple/crude auto-summary which automatically pulls out rejection reason, concerns, interesting points etc

This is very close to what the software I've been building over the last few months is, offline note transcription with summary file generation in a nicely formatted PDF/Docx using local models. Codex is available if you don't want to do the inference on your laptop (I will sort claude out soon as well).

If it sounds like something of interest then feel free to send me a message. More than happy to send you a 30 day trial version.