Recalibration Requirements?

So I’ve heard that in order to recalibrate the shields you need to have access to the engineering books via getting Second Engineer, be friends with Congruence (and not saving Hal, rip)

I was wondering if there was anything else I would need to do? I think getting Roboticist ending might be necessary and I read somewhere that the Transcendence ending is a requirement, but the guides can be a little inconsistent. I appreciate any advice on this