Add dataset curation reuse credit ledger

[tuanadr]

/claim #15

Summary

• Add dataset-curation-reuse-credit-ledger, a focused Community & User Reputation System slice for downstream dataset/code reuse credit.
• Audit citation evidence, license compatibility, self-reuse, duplicate evidence hashes, maintainer credit allocation, reputation deltas, and reuse badges.
• Emit per-reuse award/quarantine packets, profile-ready deltas, stable dcrcl_ audit digests, JSON/SVG demo outputs, and the required short H.264 MP4 demo artifact.

Non-overlap

This is not another broad reputation ledger, review-quality safeguard, abuse/appeals detector, peer-review calibration module, reviewer COI assignment module, contributor credit attestation, transparency receipt ledger, correction-impact ledger, or mentorship impact ladder. It focuses on downstream reuse credit for curated datasets and code.

Demo artifact

• dataset-curation-reuse-credit-ledger/demo-output/demo.mp4
• dataset-curation-reuse-credit-ledger/demo-output/demo.svg
• dataset-curation-reuse-credit-ledger/demo-output/reuse-credit-ledger.json

Validation

• node dataset-curation-reuse-credit-ledger/test.js
• node dataset-curation-reuse-credit-ledger/demo.js
• node --check dataset-curation-reuse-credit-ledger/index.js
• node --check dataset-curation-reuse-credit-ledger/test.js
• node --check dataset-curation-reuse-credit-ledger/demo.js
• node --check dataset-curation-reuse-credit-ledger/sample-data.js
• ffprobe -v error -show_entries format=duration,size -show_entries stream=codec_name,width,height -of default=noprint_wrappers=1 dataset-curation-reuse-credit-ledger/demo-output/demo.mp4
• git diff --cached --check

AI-assisted with OpenAI Codex; reviewed and locally verified before submission.