To start playing with it, you need to compile it. Make sure you have Go installed and either check out the infodump Go repository or install it to your Go bin with
go install git.kiefte.eu/lapingvino/infodump@latest
It is extremely likely that there are some bugs in the program, and in fact I expect the local databases to blow up after a while of testing this in the current state because I didn't implement any cleanup yet. This should be pretty easy to implement though...
Give it a try! I hope to come with a version soon that won't explode, but for the very first testing even that won't be a big issue, just to make sure that the idea works...
As it stands, it's probably too arcane to actually get to the point where it would actually blow up, but who knows!
I added basic functionality to enable you to trim your database. It might still add too much to it, but you can now avoid spreading too much old information.