[codex] Add reviewer panel consensus monitor

[Davifek]

@algora-pbc /claim #18

Summary

Adds a distinct reviewer-panel-consensus-monitor/ slice for the Scientific Bounty System bounty. This module focuses on third-party reviewer panel quality and arbitration readiness before phase advancement or sponsor reward action.

It detects:

• declared reviewer conflicts of interest
• weak independent reviewer coverage or missing expertise tags
• unlocked submission manifests or missing artifact hashes
• reviewer score variance above the rubric threshold
• missing reviewer feedback
• missing decision explanations or response deadlines

Demo

Included short demo artifact: reviewer-panel-consensus-monitor/demo.gif

Run locally:

node reviewer-panel-consensus-monitor/demo.js

Verification

Passed locally:

node reviewer-panel-consensus-monitor/test.js
node reviewer-panel-consensus-monitor/demo.js
git diff --cached --check

The tests cover a blocked panel with conflicts and missing review controls, an approved panel with independent consensus, and arbitration-ready evidence/remediation fields for every finding.

Notes

• Dependency-free Node.js standard library implementation
• Synthetic sample data only
• No credentials, external services, fund movement, or payout action required
• Includes a requirement map for Scientific Bounty System #18