/claim #18

This adds a focused reviewer-capacity guard for scientific bounty review panels.

Scope:

• checks required expertise coverage
• excludes conflicted reviewers
• flags overloaded reviewers
• blocks stale reviewer training
• returns assign, rebalance, or hold decisions
• writes JSON and Markdown review artifacts
• includes MP4 and GIF demo artifacts for review

Validation run locally:

• node scientific-bounty-reviewer-capacity-guard/test.js
• node scientific-bounty-reviewer-capacity-guard/demo.js
• node –check scientific-bounty-reviewer-capacity-guard/index.js

No credentials, private challenge data, payment processing, or external APIs are used.