feat: add charm tracing integration

[kayra1]

Description

We add charm tracing integration making it possible to send charm traces to Tempo and observe them in Grafana.

Fixes #60

Usage

Deploy COS lite with Tempo Create a model for COS

juju add-model cos

Deploy cos-lite

juju deploy cos-lite --trust

Deploy tempo and integrate it with grafana

juju deploy tempo-k8s tempo juju integrate grafana:grafana-source tempo:grafana-source

Deploy Manual TLS Certificates Create a new model juju add-model dev

Deploy Manual TLS Certificates

juju deploy manual-tls-certificates

Integrate Manual TLS Certificates with Tempo From the COS model, create an offer: juju offer cos.tempo:tracing

From the dev model, consume the offer: juju consume cos.tempo

Integrate Manual TLS Certificates with Tempo

juju integrate manual-tls-certificates tempo

Screenshot

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation
• [x] I have added tests that validate the behaviour of the software
• [x] I validated that new and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules