Problem Statement

Sentry has Developer Metrics in alpha. We should bring that into self-hosted after GA.

Solution Brainstorm

Discussion: getsentry/sentry#58584
Feature docs: https://develop.sentry.dev/delightful-developer-metrics/
SDK: https://develop.sentry.dev/sdk/metrics/

SDK guide on Python: https://develop.sentry.dev/delightful-developer-metrics/sending-metrics-sdk/