Your comment reads like something I might have written myself, down to the concern about the heat death of the universe. However, I have had one additional tho

Your comment reads like something I might have written myself, down to the concern about the heat death of the universe. However, I have had one additional thought. Have you considered a scenario in which our universe may be virtualised? “Being saved” could quite literally mean having the pattern of our existence stored outside the universe. “Omniscience” is simplified when you can pause a virtual machine to inspect its memory. And maybe, just maybe, there could be a way to escape the VM.