- pathIsHidden(".") was returning true, causing freshen to skip entire
directory tree when dotfiles excluded
- Banner now prints directly to stdout to avoid log prefix artifacts
Changed the default behavior to exclude dotfiles (files/dirs starting with .)
which is the more common use case. Added --include-dotfiles flag for when
hidden files need to be included in the manifest.
Replace callback-based progress reporting in Builder.AddFile with
channel-based FileHashProgress for consistency with EnumerateStatus
and ScanStatus patterns. Update scanner.go to use the new channel API.