Summary

• adds a dependency-free reputation badge renewal and decay gate for issue #15
• evaluates badge renewal against evidence freshness, structured review quality, reproducibility recency, contribution continuity, anonymous-review safety, and open appeals
• includes synthetic sample data, local tests, a demo script, and reviewer artifacts under reputation-badge-renewal-gate/reports/

Verification

• node reputation-badge-renewal-gate/test.js
• node reputation-badge-renewal-gate/demo.js
• node --check reputation-badge-renewal-gate/index.js
• node --check reputation-badge-renewal-gate/sample-data.js
• node --check reputation-badge-renewal-gate/demo.js
• node --check reputation-badge-renewal-gate/test.js
• ffprobe -v error -show_entries format=duration,size -show_entries stream=codec_name,width,height -of default=noprint_wrappers=1 reputation-badge-renewal-gate/reports/demo.mp4
• git diff --check

/claim #15