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charm instrumentation library using loki push api to forward charm logs (same logs that go to the juju debug-log) to a loki instance.
Similar to what tempo's charm_tracing does, the library assumes the presence of a loki_push_api integration (that the charm might be using already to push workload logs).
This library exposes a decorator the user will put in front of a charm class.
The user will pass to the decorator the name of a charm method that returns a list of loki endpoint urls to which the charm logs should be forwarded. Presumably, the user will get those endpoints from
LokiPushApiConsumer
(but in practice we don't care how the url is obtained).