v1.1.0

1.1.0

• Added: per-file progress events during directory sync. DirectorySynchronizer.apply
  now emits a transferring ProgressEvent after each file is written or deleted (in
  both push and pull directions), carrying the path (message), cumulative bytes, and
  completed/total counts — enabling consumers to render live progress. Backward
  compatible: the start and done events are unchanged and progress stays optional.