grafana/k6: technical due diligence, read from its repository

The median source file here is 106 lines. 12 files exceed 1,060 lines, the largest being 2,612. Size is not a defect on its own — some problems genuinely live in one place — but these are where merge conflicts, review fatigue and single-owner knowledge concentrate, and they are the first thing that slows an inheriting engineer down.

95 files were marked deprecated over two years ago and still are, the oldest since Jul 2019. A deprecation is a promise to remove. Ask what still depends on these, and whether removing them is scheduled.

Nothing in the service initialises an error reporter (Sentry, Rollbar, Bugsnag, Honeybadger or an APM agent). An exception in production reaches a person only if someone is reading the logs, which usually means a customer reports it first.