Default Entry Code in Check-in Instructions

Problem statement: Hosts must manually add the %smartlock_code% shortcode to their Check-in Instructions messaging rule because it is not included by default and is often missing from the shortcode picker.

Current workaround: Hosts manually type the line "Your entry code is: %smartlock_code%" into the message template.

Impact: This increases host setup effort and creates a risk that guests will not receive their access codes if the host forgets to add the shortcode.

Proposed solution: Include a default line in the Check-in Instructions rule template that says: "Your entry code is: %smartlock_code%".

Unlock: Reduced manual configuration for hosts and guaranteed delivery of entry codes to guests.