add clock uncertainty configuration option

Created by: jmitrevs

Description

Allow for changing the clock uncertainty more easily in the config

Type of change

• New feature (non-breaking change which adds functionality)

Tests

To do.

Checklist

• I have read the guidelines for contributing.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have installed and run pre-commit on the files I edited or added.
• I have added tests that prove my fix is effective or that my feature works.