Random port means we constantly need to re-agree to sending usage statistics

Should we have an option to pick a consistent port?

Can we make the choice persist across different ports?

Start by tracing the CLI's random port selection and the usage-statistics consent flow, since the issue names no files or tests. Define how a consistent port should be selected and persisted across port changes, then verify that consent is not repeatedly requested when the port changes.

Written by the indexing model from the issue text.