A deadlocked lock state in Home Assistant is misreported as Unknown #215
Description
When a Yale lock such as a YUR/DEL/1/SIL is deadlocked using the Yale Home app or an RFID tag the lock status LED flashes red however the lock status in Home Assistant becomes Unknown. The lock status should be reported as Locked for this state.
These Yale locks have three valid end-states; Unlocked, Locked, and Deadlocked (SecureMode). Transitions to the SecureMode state should be treated as a synonym for entering Locked state.
The lock can transition directly to SecureMode from either Locked or Unlocked states. SecureMode can only transition to Unlocked state.
The native HomeKit integration for these locks is also broken as the transition to SecureMode is ignored with the lock continuing to show its previous state.