Add reputation correction impact ledger

[HunterCML]

@algora-pbc /claim #15

Summary

• add a focused reputation correction impact ledger for the Community & User Reputation System
• preserve immutable reputation receipts while applying retractions, amended points, appeal holds, and restores
• recompute transparent profile and domain score deltas, revoked receipts, appeal windows, and leaderboard eligibility

Demo Evidence

• Included reputation-correction-impact-ledger/demo.mp4 as the required short video artifact.
• Included reputation-correction-impact-ledger/demo.svg, requirements-map.md, and acceptance-notes.md for reviewer context.

Validation

• node reputation-correction-impact-ledger/test.js
• node reputation-correction-impact-ledger/demo.js
• git diff --check