[raesene6]

FDE's and Yubikeys are nice and good controls for some classes of risk, but distributing your passwords onto dev laptops via a git repo. opens you up to a wide range of risks that those won't help you with.

Unless you got super-corporate lockdown with the end point devices you have risks like "A user with access to the repo. installs software which turns out to be malware", "A user with access to the repo. leaves their laptop in a coffee shop unlocked", "A user with access to the repo. puts it on a USB key and loses the key". None of these are nation state level concerns, they're things that could impact the project purely by accident, or at the hands of low-skill attackers

The point is once you've allowed secrets to be in a distributed system like this you have very little control over what happens to them, which is why I'd recommend using a secrets management system where there's more control (e.g. vault from hashicorp) in almost all circumstances.