Claim api

[yahia008]

🚀 PR: Claims REST API (Closes #41)
📌 Summary

Adds claims endpoints with aggregates, quorum progress, and optional auth filter for “needs my vote”.

✅ What was added
GET /claims & GET /claims/:id with vote tallies + quorum progress
Deadline fields aligned with contract rules
Optional JWT filter (returns claims requiring user’s vote)
Sanitized responses (prevent XSS)
Evidence URLs via trusted gateway list
Optional Redis caching for hot claims
🔁 Flow

Request → (Optional Auth) → Aggregate + Sanitize → Cache → Response ✅

🎯 Result
Frontend gets ready-to-use claim data
Accurate deadlines & quorum metrics
Scalable + safe API

Closes #41

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You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

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