Sunset inactive accounts

## Summary Sometimes users sign up, and they start using Sentry right away. A year later they are happy customers. Other times, it takes a few months for them to get going. And then sometimes a user signs up, and drifts away, never to return. It can be a signal that we're in charge of our situation if we deactivate or delete these accounts after a year or two. ## Motivation Not sure how much this matters in terms of resource consumption or security surface, and how much is simply hygiene and projection of with-it-ness. ## Additional Context I'm ticketing this from [a Twitter thread](<https://twitter.com/romantomjak/status/1374360818154938371>) where a user with a six-year-old inactive account is wondering why we never cleaned up. We want to define a set of [lightweight metrics](<https://docs.sentry.io/product/explore/metrics/>) that SDKs can automatically collect for e.g. framework, language or platform, focusing only on signals that **do NOT overlap with Tracing**. Ideally these metrics should give a quick sense of app or runtime health, … while deeper investigation will still rely on traces or profiles.<br><br>Examples**:** * Node.js runtime metrics (e.g., event loop delay, heap usage) * Prisma-related metrics in Next.js * Mobile CPU / memory usage to help surface potential ANRs or app hangs --- **Candidate Metrics (add more below)** * … *(please also add ideas, questions or examples in comments)*