5-minute video demo script and recording

[artaasd95]

Vault seed: S4-04 · Sprint: S4
Status (YAML): ongoing
Target due: 2026-08-13
Milestone: R4 — Demo

Depends on (planning): S4-03

Acceptance criteria

• docs/demo-script.md covers shock → reasoning → risk gate → learning feedback
• Recorded video (or storyboard + slides) linked from README
• Reproducible using docker compose demo stack only

Artifacts / entrypoints

• docs/demo-script.md
• README.md

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Created from projects-management vault YAML. Do not remove label vault-seed/S4-04 if you want idempotent sync.