Things that quietly disappear
This thread stays in the archive because account maintenance is part of digital systems work, even when it produces nothing visually impressive.
The useful artifact would be a repeatable process: review what exists, decide what should remain, and verify that an export is actually readable. Keeping everything indefinitely is not automatically preservation.
Still to try
This is still a research outline. I want to try the method with non-sensitive examples and show what I kept, what I discarded, and whether the exports could still be opened. The gallery image is an illustration.