Solo Mode Med‑Kit Fix & Extraction AI Behavior Adjustments

When playing solo, Merc Phone rooms that contain Health should replace the Defibrillator with standard health packs, since solo players have no use for a revive item.

Additionally, there should be an option to adjust the AI’s aggression during extraction. If this behavior is already controlled by an internal parameter, players should be able to modify it. Ideally, AI enemies would prioritize finding suitable cover while keeping the player in sight, or (and) use grenades / flashbangs to prevent players from camping.