Ability to set CreatedTimestamp on constant histogram metrics #1535
Description
#1313 added created timestamp to the internal histogram data model:
I don't see a way for clients to set the value for created timestamp? Specifically we are trying to use prometheus.NewConstHistogram
I think this is why we're not getting any results when trying to calculate histogram_quantile since our _bucket counts don't start at zero without created timestamp injection. It'd also be nice if the _sum and _count metrics had zero injection.
Curious to know if hiding created timestamp from clients is intentional here, like if this part of the feature is WIP.