Is your feature request related to a problem? Please describe.
Makes it pretty clean to make boss-specific auras.

Describe the solution you'd like
A checkbox and a name, similar to zone name load

Additional context
It is not entirely certain that these events are going to be around forever in classic to my knowledge.

As far as I know that event does not carry any information on classic which allows detecting which encounter started.

It does contains the id, name, difficulty (though this is always 9). Group size is 40 for all current content, might be 20 in ZG but 🤷‍♂. I'm not sure what the 5th parameter is, since it's not in the gamepedia documentation Okay it's only for end events, but it is always 1. ENCOUNTER_END notably triggers on player death, so I suppose you never "wipe". It may count as a wipe if youre the last person to die.

Here are pictures of me having a weakaura that screenshots when encounter starts and ends

also works for multi-part fights like nefarian