Initialise Prometheus registry from a given datasource
In theory, Prometheus metrics should be assumed that they are volatile. However, in some specific cases, Counters may be useful at their absolute values besides applying a function, e.g., rate() on them. For these specific (and rare) cases, you might feel like you need your counters to keep counting even after an application restart. Here's where prometheus-init may help you: it provides an API for you to load your metrics (that you have dumped into a file or another system) into a registry, and from there you can continue the usual metrics manipulation.