we check if all dynamic_writers are closed and if the backup contains
any valid files, we can only mark the backup finished after those
checks, else the backup task gets marked as OK, even though it
is not finished and no cleanups run
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>