fix: remove unnecessary (time-consuming) debug logging

[Abuelodelanada]

Issue

This log entry is generated when a cache has been hit, and much of the time saved by not running subprocess.run is lost because logger.debug is ultimately executed, which in turn results in the juju-log binary being run within the container.

Solution

Checklist

• I have added or updated relevant documentation.
• PR title makes an appropriate release note and follows conventional commits syntax.
• Merge target is the correct branch, and relevant tandem backport PRs opened.
• This change warrants a release, so I have updated the project.version field in the pyproject.toml file.