The file type before it was changed (matches filebase base_type standard). Type identifiers: "f" = File, "d" = Folder/Directory, "fa" = FileAlias (alias/symlink).
FileAlias always uses "fa" regardless of whether it points to a file or folder (no "da" distinction).
For history purposes - represents what the file was before the change: - For "added": represents the type of the new file - For "deleted": represents what type it was before deletion - For "modified": represents the file type (usually "f")