Kyle added some instrumentation for our Go tests using gotestsum's XML output. This data is sent to DataDog and tells us how long tests take to run (including trends over time), so it is useful for us to identify opportunities to improve test performance.

Documentation about CI visibility features here: https://docs.datadoghq.com/continuous_integration/

DataDog provides an agent and instructions for adding this instrumentation, which appears to be relatively straightforward, so we should explore doing that for our TypeScript tests.