persona versions

4 operations in this group.

• GET/v1/personas/{id}/versionsList the version history for a persona.
• GET/v1/personas/{id}/versions/{no}Fetch a specific persona version snapshot.
• GET/v1/personas/{id}/versions/{no}/diffDiff a historical version against the current persona state.
• POST/v1/personas/{id}/versions/{no}/restoreRoll the persona back to a prior version (creates a new version row).