Write latest manifest file
Manifests currently cannot restore the "latest" backup because it would require an expensive object-storage directory traversal. So instead it defers to the pointer layout. The problem with this is that you then loose manifest only features like setting the default branch properly.
Here we write two manifests: the normal backup manifest as before and an additional "latest" manifest file. This latest manifest is overwritten on each backup taken.
For WORM we would ideally not overwrite any files, but until this is implemented we need something to fill the latest restore gap.
Edited by James Fargher