Simluation fix

[Nicolas469]

Description

This will change several things in a simulation where simResultOnly is used:

• add the open trade margin (if any)
• convert _last_trade_margin to a float (instead of a string)
• remove useless logging

  Type of change

Please make your selection.

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update
• [ ] This change requires a new dependency
• [ ] Code Maintainability / comments
• [ ] Code Refactoring / future-proofing

How Has This Been Tested?

I've rebuild the docker image and run several simluations with this new version.

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added pytest unit tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings

[whittlem]

Are you able to explain what this