Unhelpful metric labels for lambda layers

[omad]

Description

I'm trying to create some awesome dashboards in Grafana to visualise what our OWS service is doing, and noticed a bunch of unhelpful information between exposed. Lots of the metrics labels are showing up us <function <lambda> at 0x7f4eb019b0a0>.

I'm not sure if these are layers or queries that should have a more useful name, or if they should be removed from the /metrics response.

Steps to Reproduce

1. Visit https://nc-ows.dea.ga.gov.au/metrics
2. Try to work out what these metrics are referring to.