fix: show microsecond precision in borg diff when timestamps differ only at sub-second level (fixes #9147)#9561

hiepau1231 wants to merge 7 commits into

borgbackup:masterborgbackup/borg:masterfrom

hiepau1231:fix/bsd-hardlink-diff-timestamp-9147hiepau1231/borg:fix/bsd-hardlink-diff-timestamp-9147Copy head branch name to clipboard