If it's worth saying, but not worth its own post, then it goes here.
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So go complain to Memento's creator how it doesn't fit your use case :-P
I don't think "data entry" is the problem that Memento is designed to solve well. From a QS standpoint a feature like notification seems key but from a "build a database"-standpoint it isn't.
Thinking in terms of QS leads to getting as much timestamps as possible but if you design a database than you don't add columns that the user doesn't explicitly suggest he wants to have.