Merged and corrected fixes for Infinite Dungeon challenge quests:

• Pacifist: direct and summon kills both fail the challenge immediately instead of summon dismissal giving you a fail when you leave the level; dismissing (or otherwise self-destructing) your own summons no longer counts as a kill, so involuntary summons from gear/skills cannot fail you unfairly.
• Exterminator: the remaining-enemies counter is now live (dead or off-map foes do not count), refreshed properly every turn, with invalid values (NaN/nil/negative) actively corrected.
• Incorporates the Infinite Dungeon Challenges Fix by Blaises: summon/clone deaths no longer trigger challenge resolution for any challenge type.
• Safe retro-patch: existing active challenges are patched automatically on first load if necessary, with a notification describing what was found and fixed.

Superloads mod/class/GameState.lua and mod/class/Actor.lua.