pub fn open_root(key: RootKey) -> Result<Arc<SharedRootHandle>, (u8, String)>Expand description
Open (or join) the shared root for key, arming a native watcher on
first open — before the initial enumeration, so nothing slips between
scan and event delivery. On failure returns an FS_STATUS_* code plus
diagnostic, so the server can answer FS_SYNCED accurately.