Add an API to check for spec violation from entities

[christophe-calmejane]

Everytime an entity violates the spec (IEEE/Milan), instead of simply removing the compatibility flag, add the event to a list of violation that can be retrieved from the ControlledEntity (instead of having to parse the general log).

Ideally it would be a list of enums, each enum representing a specific rule from the spec. Maybe Category+Rule for better sorting and scalability.