I gave a very quick look at 0001 and 0003. I find no fault with 0001. It was clear back when we added that stuff that invalidated_at was not terribly useful -- I was just too conservative to not have it -- but now that a lot of time has passed and we haven't done anything with it, removing it seems perfectly OK.
As for 0003, I have no further concerns about the translatability. -- Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/ "El miedo atento y previsor es la madre de la seguridad" (E. Burke)
