> My itinerary allowed for just an hour to disembark the first segment, go through immigration in Paris, then board the international segment. This connection was going to be tight—doable, but tight.

Yeah anyone who has been to CDG (Paris) knows that that is very much not doable in normal circumstances. CDG is honestly one of the worst airport experiences of my life and many others say the same. I happily pay more for flights to avoid going through paris.