Add additional details about log structure

[LucasRoesler]

What

• Add details explaining where the values in the log lines come from. Identifying the parts that are metadata from the log provider and the parts that are the actual log message.

Motivation and Context

• [ ] I have raised an issue to propose this change (required)

Follow-up to 258

How Has This Been Tested?

Viewed the rendered pages using Docker

docker run --rm -it -p 8000:8000 -v `pwd`:/docs squidfunk/mkdocs-material

for example

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I've read the CONTRIBUTION guide
• [x] I have signed-off my commits with git commit -s