[Investigate] `juju-jimm-k8s` has no log-proxy endpoint

The CharmTestProducer saw that jimm had a log-proxy endpoint, but it seems to have disappeared?

See: https://test-observer.canonical.com/#/charms/405573?testExecutionId=432326&testResultId=9844402

Investigate to ensure there is not a bug with our pipeline.

Again, it is possible that the test producer produces a test against the stable charm, after which the stable charm updates and the endpoint is removed. I *suspect* that is what occurred here.

Start with the CharmTestProducer result at the linked Test Observer execution and inspect how the juju-jimm-k8s stable charm was selected and queried for the log-proxy endpoint. Compare the tested charm revision with the current stable charm to determine whether the pipeline reported stale data or the endpoint was actually removed. Done means documenting the cause and identifying the required follow-up.

Written by the indexing model from the issue text.