Integrate Sentry for Error Tracking and Performance Monitoring

[carlos-israelj]

Description

No error tracking system in production. When users encounter errors, we have no visibility into what went wrong, making debugging difficult and slow.

Current State

Winston logging to console only.

Problems

• No error aggregation
• No stack traces in production
• Cannot track error frequency
• No performance monitoring
• No user context in errors

Proposed Solution

Integrate Sentry for error tracking, performance monitoring, and alerting.

Acceptance Criteria

• Sentry SDK integrated (backend + frontend)
• Source maps uploaded for stack traces
• User context attached to errors (wallet address)
• Performance monitoring enabled
• Alerts configured (Slack/email)
• Release tracking
• Custom error boundaries in React
• Transaction performance tracking

ETA

1 week

Cost

Free tier: 5k errors/month, 10k transactions/month