Set door code message timing independently of lock activation

Allow hosts to choose when the automatic Door Code message is sent, independently of when the smart-lock code becomes active.

For example, a host may want a code to work four hours before check-in to accommodate approved early arrivals, but send it to the guest only 10 minutes before check-in.

Currently, the automatic Door Code message timing can follow the lock’s activation buffer. This can result in guests receiving their codes earlier than the host intended. The guest portal’s code-visibility setting is separate and does not control the message.

Desired outcome:

• Set the lock activation buffer and automatic message timing separately.

• Preserve the chosen message timing when Smart Lock settings are saved.

• Clearly distinguish message timing from guest portal visibility.

• Account for backup-code and failed-code notifications so guests still receive reliable access information.