[FEATURE] Skip download phase for local backups

[2ban]

Is your feature request related to a problem? Please describe.
Hello, I'm using Esop with Icarus, and saving backups to local storage (file:///backup-storage/mybackups/some/backup/path).
When I need to restore it, I must specify sourceDir, where backup will be downloaded and imported from.
It makes sense for s3 and other network storages, but not for local.

Describe the solution you'd like
Skip download phase for backups that saved locally

[smiklosovic]

I know about that but just skipping the download and importing it directly from the dir on the disk is not so easy because the layout is just different and it would break things / it would introduce a lot of problems in the implementation.

What might be possible is to still "download it" but that downloading would be just hardlinking. In other words, it would seem like it is downloaded but it would be just stored under sourceDir having different directory structure so it would not occupy any space and it would not take any time to "download it" either.

[2ban]

Hardlinking sounds good, the goal is to eliminate losing time and disk space