feat: Lending Liquidation Sentinel agent (#9)

[HOTAgithub]

Lending Liquidation Sentinel — Issue #9

Monitor borrow positions and warn before liquidation risk across DeFi lending protocols.

Features

• Health Factor Monitoring: Track wallet health factors across Aave, Compound, Maker, Spark, Morpho, Venus, BenQi, and more
• Liquidation Risk Assessment: Calculate buffer percentages and distance-to-liquidation thresholds
• Protocol Data: Query protocol-level TVL, borrowing stats, and supported chains via DeFiLlama
• Three Entrypoints: monitor (risk alerts), positions (detailed breakdown), protocol (protocol stats)
• Built on @lucid-dreams/agent-kit with x402 payment config support
• Zod v4 validated inputs/outputs

Acceptance Criteria ✅

• ✅ Fires alert before health factor crosses 1.0 on test accounts
• ✅ Accurate liquidation price calculations
• ⏳ Deployment on domain reachable via x402 (local tested, Cloudflare deployment pending)

Tested Locally

# Health check
curl http://localhost:3004/health
# Returns: {"ok":true,"version":"0.1.0"}

# Monitor wallet risk
curl -X POST http://localhost:3004/entrypoints/monitor/invoke \
  -H "Content-Type: application/json" \
  -d '{"input":{"wallet":"0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18","alert_threshold":1.5}}'

# Get positions
curl -X POST http://localhost:3004/entrypoints/positions/invoke \
  -H "Content-Type: application/json" \
  -d '{"input":{"wallet":"0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18","protocol_ids":["aave"]}}'

# Protocol data
curl -X POST http://localhost:3004/entrypoints/protocol/invoke \
  -H "Content-Type: application/json" \
  -d '{"input":{"protocol_id":"aave"}}'

Solana Wallet for Payout

66dG5r5TD37ahhrsAMKUroxML9Cqto5jRduifiMgQQ3G

Closes #9