docs: Add user personas testing report with security analysis

Multi-persona review of EventRelay platform informed by Clawdbot/Moltbot
video (youtube.com/watch?v=U8kXfk8enrY). Evaluates the platform from six
personas: Human Operator, Automated Bot, AI Agent, Security Researcher,
Content Creator, and Enterprise Admin. Identifies critical gaps in auth,
agent sandboxing, and prompt injection defenses with prioritized action items.

https://claude.ai/code/session_01M63176gXwtV8qTETWKyuV6

Author: claude