Currently, Confluence does not track the instance of macro on a page between edits. This means confluence does not know if you deleted, and added a macro or just edited one on a page.

We should add a random uuid to the storage format to track new instances of macros. This will allow us to get notified when they are added/edited/deleted, and also allow for a simpler (more robust) solution to CE-14.

Risks:

• Upgrade task. Do we need an upgrade task to upgrade all pages that have macros but no uuid?
• Copy page (or editor body). How do we detect duplicate UUIDs so we can generate a new one?