fix(ext/node): also wake event loop from read_start_tty on Windows
The wake() from ensure_tty_registered only fires for queued writes.
If read_start_tty is called after run_io() has already finished
iterating tty_handles (e.g. from a microtask), the stdin handle
won't be processed until the next event loop tick. But nothing wakes
the loop to trigger that tick.
Wake from read_start_tty so poll_tty_handle runs promptly, which
both registers RegisterWaitForSingleObject for input notifications
and drains any pending stdout write callbacks.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
