This merge request switched the AQS 2.0 pageviews service to the fasthttp router. The unique devices service was previously switched in this merge request, but did not include all that changes that made it into pageviews.

Notably, unique devices currently includes a hard-coded timeout value, which we made be a config variable in pageviews. Sorry, I should have caught that in code review on the previous merge.

Please port any relevant improvements, including the config variable, from pageviews to unique devices, so that the two services match.