Nice, I had no idea this was already 'a thing' :) Thanks again for this!
What I want to do is indeed capture my emails, social media posts, photos, location data and chats (I run everything through Matrix anyway so that's pretty easy). And then store it in a database (or just a filesystem per day, not sure about that yet - I see your concerns about databases for this and I agree). With the more sensitive stuff GPG encrypted.
I'll see if your projects can help me out with this, thanks! Like you say in your readme, indeed my goal is to regain control of my information. And enable myself to actually do something with it.