Actually, when are College Vows like Vow of Poverty or the Light Order celibacy vow sworn? Right at intake, during the Journeyman promotion, or somewhere in between? Some few students never become Wizards. Even fewer switch College before getting any Arcane Marks. I can't imagine that either category are expected to adhere to a lifetime vow, but I'd also be surprised if any of the vows have a clause along the lines of "for as long as I am a [color] Wizard".
On intake. There's a ceremony to release them of those vows if they leave the Order.
I wonder what happened to those fortifications. They were presumably made to Dwarf specification. Did Humans take them apart for stone? If yes, are there any resulting Grudges or did the Dwarves consider above ground forts built far from mountains to be temporary anyway? Maybe I am just underestimating what kind of effect multiple millennia of weather has even on Dwarven construction.
They were swallowed up by a time vortex that formed as a result of me nailing down a lot of the lore for Laurelorn before Archives of the Empire Volume 1 was released.