Datadog metrics do not work outside of a Racecar process

[jalford14]

When enable_datadog is set to true, only processes running Racecar are able to report Racecar-specific metrics to Datadog. For example, if we call Racecar.produce_sync in a Rails process (which is not running Racecar), the metrics won’t be reported to Datadog. This happens because Racecar::Cli, which configures Datadog, is never invoked in this context.

As a temporary workaround, we configured Racecar::Datadog directly in our initializer. Would this be considered a bug?