tryResume
Attempts to resume the peer identified by token.
Validation order:
Session match — ResumeToken.roomId must equal the controller's Room.
Window open — the reconnect window for token.peerId must still be active at at.
Token not yet consumed — a token may only be used once per window.
On success, emits JoinerReconnectEvent.Resumed and closes the window so a second tryResume with the same token returns ResumeResult.WindowClosed.