i know this is old, but (spoilers ofc)
about the gift source, if Im reading this right typing "beatrice castiglioni" in the prompt says she gave it to her, and "I" is used in an entry about her grandchild telling her about something like battlers promise. given what happens with the rest of them, I wouldn't be too surprised if she was also digitized at some point and is butterflydb in some way.
so my personal read is "record" is her daughter, the equivalent of kuwadorian beatrice, who also had her own child, lion (in something analogous to canon? typing "ootsuki" mentions "the true face of the Ushiromiya family head and what he had done to her and her daughter") who becomes the text seen in "restore".
my guess was something messed up with beatrice II's digitization, given how the text in record goes, and it was tried for a second/third time with lion, which explains why their disappearance happens in 1985. as for why shannon's still writing until 1988--maybe she's serving as a hope spot, just like in canon? but one that's eventually failed, evidently...