I believe my app (launching soon) is close to solving your "what do I want" but currently wrapping up the API. Are there some other communities, links to other blogs or people that are doing what you are doing? (Tracking this much data, etc.)
For exporting and owning the data the keyword is "data liberation"
Otherwise, the keywords are perhaps "personal knowledge management" and "memex". Have some links here, although they all have different components in scope https://beepb00p.xyz/exobrain/memex.html#cmmnts
I usually maintain related links at the end of articles, so perhaps you can find something there, for example https://beepb00p.xyz/sad-infra.html#links
Either way don't think I've seen anything better, so the best way would be to suggest them updates or help maintaining :)