Adding Direct Mail Feedback Support to AJO Feedback Schema

What are the schemas that are affected by the issue
https://github.com/adobe/xdm/blob/master/extensions/adobe/experience/customerJourneyManagement/message-delivery-feedback.schema.json
https://github.com/adobe/xdm/blob/master/extensions/adobe/experience/customerJourneyManagement/messageprofile.schema.json

What are examples of products that are impacted by the issue
AJO (Adobe Journey Optimizer)

Start by reading message-delivery-feedback.schema.json and messageprofile.schema.json, then inspect their existing feedback and delivery definitions. Identify the schema changes needed for AJO Direct Mail support and verify that both named schemas consistently represent the affected product use case.

Written by the indexing model from the issue text.