Beginner tutorial: GenAI/MCP replay bench

CI-safe replay buffer — no LLM sampling drift.

pip install 'uhbs[genai-bench]'
uhbs genai-bench example beginner --out genai-beginner
uhbs genai-bench analyze genai-beginner/replay.json --out report.json

Check metrics.clr, metrics.scr, and metrics.ttft.penalize_high_latency (false when timing_intent is tarpit).

Does not change UHQS. Not exposed via uhbs-mcp.