Feature: Implement lending pool risk scoring framework with real-time ratings

[devdianax]

Context

Lenders need clear risk assessment per pool to make informed capital allocation decisions.

Current Limitation/Problem

No risk scoring exists. Users must manually research pool parameters and asset risk profiles.

Expected Outcome

A risk scoring framework that evaluates pool health, asset volatility, oracle quality, and historical performance to produce real-time risk ratings.

Acceptance Criteria

• Define risk factors: asset volatility, oracle deviation, pool utilization, liquidation history
• Implement scoring algorithm with configurable weightings
• Produce letter-grade ratings (A+ through D-)
• Real-time score updates on each pool state change
• Historical risk score tracking for trend analysis
• Risk score breakdown: contribution of each factor
• Dashboard: pool risk comparison, rating distribution, historic trends

Technical Scope

• contracts/lending-pool/src/risk.rs - on-chain risk scoring
• backend/src/services/risk/ - scoring service
• Prisma: PoolRiskScore, RiskFactorHistory models
• Frontend: risk score display and comparison UI
• Edge cases: new pools with no history, flash loan impact on scores