Yes, I do. I have a diary for 2 years already and I know that everything gets forgotten quickly. So I try to write a legend for my future self.
I put the context in the journal entries, sometimes I write it in the margin. Although, whatever solution you come up with and feel comfortable with is great! This is YOUR journal, so do what you want!
No, do you ? Never thought about that way of writing about myself as it seems like I would make up stories even that you don’t have to buy that is the first thing it came to mind