anchor.diff:  result in audit event creation.
   
   
  -
   ## Using Audit Events
   
   The following describe some of the intended use cases of audit events.
  
positive.code: 
  - audit.app.crash
  - blob.remove\_orphan
  
negative.code: ### External Auditing Warehouse
  
  For auditing and compliance reasons, some operators may wish to keep a record of all audit events that have occured. Because audit events expire
  and may be purged during a deploy, these operators must maintain an external data warehouse. This way they can store and access events across expiration events
  and conform to their own compliance requirements.
  
  ## Types of Audit Events
  