Pattern: Message Envelopes

Show how to implement a message envelope where important message information is promoted and contained within a common envelope structure allowing for flexible message contents.
- find data within a message
- promote important data into envelope
- How to process across LogicApp, Functions, ServiceBus, etc.
- Envelope tracking and reporting

Review the requested message-envelope pattern across LogicApp, Functions, and ServiceBus, using the four listed goals as the scope. Done should be a documented example showing how to find message data, promote important fields into a common envelope, process it across those services, and support envelope tracking and reporting.

Written by the indexing model from the issue text.