fix(clear): reorganise file_paths manipulation logic

[tjzegmott]

Description

Related Issue

Screenshots (if appropriate):

Types of changes

• 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:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[github-actions]

coverage: 66.796% (+0.08%) from 66.719%
when pulling 80f0f2d on 107-bug-datatrail-clear-command-failing-to-clear-staged-basebandraw-data-on-arc-1
into aabcad1 on main.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.79%. Comparing base (aabcad1) to head (80f0f2d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #109      +/-   ##
==========================================
+ Coverage   66.71%   66.79%   +0.07%     
==========================================
  Files          14       14              
  Lines        1286     1286              
==========================================
+ Hits          858      859       +1     
+ Misses        428      427       -1     

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