It appears that Python doesn't reliably (or maybe just doesn't at all) flush and close non-standard FDs on exit. This randomly caused the artefacts list to get lost to /dev/null.

Closes #15

Also fix a small discrepancy between the commit list and bundle due to --reflog vs --all

A significant part of this code (e.g. the module loading, HTTP retrieval, CLI) was mostly or entirely copied from snscrape.