Never got around to create bespoke visualisations for all the different kinds of metrics, but having all that data in Grafana made it a lot easier to play around and get insights.
Nope, sorry. But I'd try a friendly request to Lightstreamer (they handle the Telemetry feed), or the NASA and ESA public relations offices; they must keep a database somewhere.
Yes and no. I have 7+ years and counting of telemetry recordings but I don't know of a resource that would let me get all of it historically. If you know of one, please let me know.
The recordings that I do have will be integrated into the website at some point. I was going to do it as part of the initial launch but I ran out of time.
https://iss-mimic.github.io/Mimic/
Lots of interesting information in there, like how much water is getting used, and which direction all the panels are facing.