adding semantic logging variables

[Aaronontheweb]

Fixes #

Changes

Please provide a brief description of the changes here.

Checklist

For significant changes, please ensure that the following have been completed (delete if not relevant):

• [ ] This change follows the Akka.NET API Compatibility Guidelines.
• [ ] This change follows the Akka.NET Wire Compatibility Guidelines.
• [ ] I have reviewed my own pull request.
• [ ] Design discussion issue #
• [ ] Changes in public API reviewed, if any.
• [ ] I have added website documentation for this feature.

Latest dev Benchmarks

Include data from the relevant benchmark prior to this change here.

This PR's Benchmarks

Include data from after this change here.

[Aaronontheweb]

Failed experiment