I also doubt any of the Thalmor in Skyrim would have any reason to discuss the plan to end the world, especially in writing. It's a plan for the rulers of the Thalmor and their magical and theological advisors to discuss and work on from the safety of the Summerset Isles, their agents don't need to know anything about it that you couldn't hear from any altmer priest of Auri-El. Hell, most of their agents don't even need to believe in it being possible or desirable to act towards it.

The elven faiths preach that the world is a prison, it's a common thread in most of them, but I doubt most elves actually believe it deep down, much as I doubt many Nords truly believe in Sovngarde, or believed in Alduin or dragons.

In theory the divide between true religious zealots and pragmatic racists could extend all the way up their heirarchy. We don't know anything about who's actually in charge of the Thalmor as an organisation, it's entirely possible that some of the highest ranking members believe in ending the world and have the steps they believe to be important in that as part of the cost of their cooperation with the more down to earth Thalmor. Coincidentally the important stuff to end the world is mostly things the Thalmor want to do anyway regardless of if it brings about the end of days. Oppress non-altmer, outlaw Talos, destroy the Empire, hoard magical and religious artifacts which might be helpful to bring about or prevent the end of the world.