Add project data room consent ledger

[HunterCML]

/claim #11

Summary

Adds a focused project-data-room-consent-ledger module for the User & Project Management bounty. This is a distinct project data-room access slice, not another broad RBAC/offboarding/identity-merge implementation.

Scope

• verifies institutional, external, and anonymous-review identity evidence
• enforces MFA, SAML, ORCID, identity-escrow, and profile-mode handling
• evaluates role-based and object-level grants across project documents, restricted datasets, and review threads
• holds restricted dataset downloads unless IRB protocol, data-use agreement, export policy, expiry, and institutional sponsor evidence are present
• emits deterministic audit-chain and export-packet digests for reviewer and institutional records

Demo evidence

• project-data-room-consent-ledger/demo.mp4
• project-data-room-consent-ledger/demo.svg
• project-data-room-consent-ledger/requirements-map.md
• project-data-room-consent-ledger/acceptance-notes.md

Validation

• node project-data-room-consent-ledger/test.js
• node project-data-room-consent-ledger/demo.js
• git diff --check
• ffprobe -v error -select_streams v:0 -show_entries stream=codec_name,width,height,duration -of default=nw=1 project-data-room-consent-ledger/demo.mp4