Add events to AuthorizerAdaptor

[nventuro]

Some actions (such as killing gauges) don't emit events - it'd be useful to get the Adaptor to emit events with target and data when triggered.

This can of course not be done natively as we cannot modify the already deployed adaptors, but we could have an external layer (an entrypoint) that is interacted with instead of the adaptor, and have it emit said events. This could prove useful if we wanted to add more features to it (such as improving the permission scheme).

[nventuro]

@jubeira we seem to have forgotten about this - can you add it to the entrypoint?