Replace console.error with structured logging system (Winston/Pino)

[cursor]

Description

The audit found that the codebase uses console.error throughout for error logging. This is not suitable for production and makes error tracking difficult.

Context

Current state:

• console.error used in 30+ API routes
• No log levels (debug, info, warn, error)
• No centralized logging
• No structured logs (JSON)
• Logs remain in production

Requirements

1. Choose Logging Library

   • Winston or Pino (recommended: Pino for performance)
   • Configure for different environments

2. Implement Logging Utility

   • Create src/lib/logger.ts
   • Support different log levels
   • Structured JSON output
   • Environment-based configuration

3. Replace console.error

   • Find all console.error calls
   • Replace with logger.error()
   • Add context and metadata

4. Production Configuration

   • Remove console.* in production
   • Configure log levels
   • Set up log aggregation (optional)

Acceptance Criteria

• Logging library installed
• Logger utility created
• All console.error replaced
• Log levels configured
• Structured JSON logs in production
• No console.* in production code

Related

• Audit Report: PR Project audit and review #63
• Audit Finding: Error Handling section

Priority

High - Critical for production monitoring