Contributor leaderboard and reputation dashboard

[mahsumaktas]

Summary

Rank contributors by PR quality using Treliq's scoring data. Surface top contributors and track reputation over time.

Metrics

• Average PR score
• Merge rate (% of PRs merged)
• Average time to merge
• Spam/duplicate rate
• Review participation

Output

• CLI: treliq leaderboard --repo owner/repo
• Dashboard page: /contributors
• API: GET /api/contributors

Data

Uses existing reputation system (src/core/reputation.ts) + historical scan data from SQLite.

Why

Helps maintainers identify reliable contributors for CODEOWNERS, maintainer promotion, and community recognition.