I assume tests need to be purged at some point to save space, but is it possible to have them go back further than 365 days?
The tests aren’t actually purged - I have all of the tests (well, most of them anyway) going back to 2008. It’s only the test history UI that limits to 365 but you can modify the query params in the URL to go back as far as you’d like. Expect it to be really slow though because it is searching through flat text files for the test history (never got around to building something smarter).
I might be able to do a quick hack with a first-pass using grep to do faster parsing but that shouldn’t limit your ability to go back further.
Looking at the logs on the server, looks like I have them going back to Feb 2008.