Business Problem: Currently, the contact payload does not include a "last updated time" field, making it difficult to track when a contact’s details were last modified. Without this timestamp, users and systems cannot efficiently monitor or trigger actions based on recent updates, leading to potential data inconsistencies and missed automation opportunities. Desired Outcome: Introduce a last_updated field in the contact payload that records the most recent modification timestamp. This field should update whenever any contact information (e.g., name, custom fields, tags) is changed, ensuring accurate tracking and automation capabilities. Use Cases Workflow Automation: Trigger actions based on recent contact updates (e.g., follow-up messages, CRM updates). Record Auditing: Improve data integrity by providing a clear history of when a contact's information was last modified.