My question is: how do we compensate or remedy this in post?
I think that in everyday shooting with digital cameras this is a non-issue, the camera white balance is based on the TWIMG (the world is middle gray) presumption and there is no yellow cast. Film is different, the cast has always been there and white balancing requires filters (on-camera or on-enlarger).
Bjorn Rorslett already gave the advice about custom profiles and he knows about this subject a lot more than me.
One thing to note is that if absolute color perfectness is required, filters and profiles cannot add colors that are either missing or that have been mapped to another color causing metameric error. For example the camera might represent the missing violet as blue, but that cannot be brought back to violet without messing the blues and converting some blues to violet that should have remained blue.
Then again, the reproduction chain as a whole has bigger problems (lens, processing software, monitor, paper, inks, ambient lighting when viewing the images etc. ad infinitum...). This narrow band of wavelengths is trivial. And we have to remember, wavelengths are not colors. There's no pink or brown for example in the rainbow. These colors are CREATED by metamerism in the BRAINS of the observer. And we all have unique eyes and unique brains.
In my humble opinion mr Rorslett's advice about profiles gives the best results, and that mr Chabers's blog post is just background noise.
