Observability

Description

Set up, advise on, and review error tracking, logging, tracing, and alerting across Next.js, Expo/React Native, Supabase, and .NET — Sentry (or equivalent) with source maps and release tagging, Next.js instrumentation.ts and onRequestError, OpenTelemetry traces and metrics, structured logging with correlation IDs, PII scrubbing and sampling, mobile crash reporting with release health, alerts tied to SLOs and staged rollouts, and dashboards that answer "is the release healthy?". Use whenever the user adds Sentry/OpenTelemetry/logging, asks why errors aren't showing or stack traces are minified, wants alerts or dashboards, or prepares monitoring for a launch or rollout.