WeatherSignalBoardStatus

Board publication metadata. Returned by: weather_station.signal_board.status()

Member	Returns	Meaning
.has_input	boolean	Whether this station has published a Signal Board value
.published_at_gh	number or None	Publication timestamp
.freshness	string	"no_input", "fresh", or "stale" (a publication becomes stale after 2 world-clock hours)
.event_id	string	Event shown on this station’s board, or empty