Ensure archive exists when editing.

[fpiesche]

I've never worked with FastAPI before so I'm not sure if the get_archive() function or any of the calls within it need to be async as well... be good if you could check and/or clarify that?

[Jeeaaasus]

I tested and it works as expected! As for whether it needs to be async or not, I am unsure.. I'm still learning as this project goes on and it also doesn't need to be perfect.

The one change I want to see before I merge is to move the 'get_archive' function to right after the 'execute' function at the top for better readability. :) Otherwise 👍