Now we’re getting stuck into the ugly details, which I suspect will make this hard to implement 
It’s also the point at which my knowledge of Discourse internals dries up so I have no idea how hard/easy that would be.
If all else fails, it would still be very useful to see your own uploads (and for admins to track down the gigantic ones that are taking up all that space on the server etc.)
Just thought of a further complication - if an admin adds an upload to someone else’s post, or in the case of a wiki post with many uploads, who do those uploads “belong” to? Unless the information is captured at the time of uploading, it would be impossible to know…