Generating A Static HTML Archive Of Forgejo Issues

Over the years, I've come to use project management systems quite heavily even for things with no code involved. I maintain projects to track things that need doing round the house, maintaining cars, the LAN and even financial planning. The ability to add comments (a link to previous issues) makes issue management far better than a simple todo list. However, I've always been a little concerned about longevity: if something were to impact my ability to run JIRA/Gitlab/Forgejo, I could lose access to the information contained within my issue tracker. For some issues, a failure probably wouldn't actually matter that much - there's not much future value to a completed issue which says "put shelf up in bedroom" - but for others it does: how did I fix that issue on the car the last time (if you own a car for as long as I tend to, issues do tend to come back up). To address this issue for JIRA (and, later, Gitlab) I developed some tooling which was, essentially, a reverse proxy written in…