- Updates `UpstreamLink.ready_to_sync` with the top-level parent logic: In a container, `ready_to_sync` is `True` if the container or any children have changes. - Updates `decline_sync` to decline children recursively.
- Updates `UpstreamLink.ready_to_sync` with the top-level parent logic: In a container, `ready_to_sync` is `True` if the container or any children have changes. - Updates `decline_sync` to decline children recursively.