Diff view of Loculus versions

[corneliusroemer]

It would be great if people could easily check what changed between Loculus versions.

This could be a new REST endpoint /diff that takes two versions and outputs only changes. This could then be surfaced on the website in some way.

We could eventually even offer blame, which could be something cool to surface on every sequence details page, i.e. annotate fields with the version since which the field has been what it is now.

[theosanderson]

This is a dupe of #69 - could be good to merge them

[corneliusroemer]

I closed that old one as it's outdated and it's better to have the current view on things