Green Checks Lie: Backend Error Tracking for Cron Jobs, Workers, and Silent Web APIs

Effective error tracking for cron jobs, workers, and web APIs requires separate signals for exceptions, missed schedules, unfinished runs, and invalid results. In NestJS, using exception filters and interceptors for HTTP tracking, alongside explicit boundaries for queue workers, prevents alert noise. A practical design implements a unified event contract across scheduled invocations and HTTP requests. This approach ensures visibility into silent failures where processes exit normally without throwing exceptions, maintaining a searchable context without compromising customer data.