Promotion pathologies.

As I was working on the Staff promotion packets article,
I originally included a section on "Promotion pathologies" to (attempt to) avoid when
going up for a promotion to a staff-plus engineering role, but
it ended up making the article less cohesive so I scrapped it there
and have pulled it out here as a separate post.

I've written about some of the weird emergent behavior around promotions,
but didn't address how some recurring tropes often derail individual promotion nominations.

The themes...