Many old, unmaintained apps have been archived

Does this mean that MD5-signed apps will be moved back to the main repo after the upgrade to apksigner 0.8? If not, are there any other current plans to get them back in the default repo with secure signatures? @katjav stated in another thread that a failing rebuild might cause a loss of the last working apk for some apps: Osmand~: Contour lines and hillsides plugin? - #7 by katjav

I wonder if it is not possible to create snapshots of the relevant systems / databases to roll back to the current state when a build fails. Is anyone familiar with that? Because I do not know the F-Droid infrastructure and how new build are exactly published.