Add hotseat multiplayer Red Team controls and 4 architectural fixes

Gracefully handle invalid LLM actions with -0.2 penalty instead of 500 crash

Fix attack_chain KeyError and other validation errors

Initialize _step_reward_total in __init__ to fix AttributeError

Add root health check route to fix HF 404

Add FSP multi-agent architecture: Red Team LLM action space + alternating turns

Replace SOAR playbooks with agentic micro-tools.

Add .gitignore, improve play_environment pending_followup tracking

Initial commit of CyberSOC upgraded RLVR environment