fix: clarify logic in min distance grpc call

[RobPasMue]

Description

Clarify logic in min_distance_between_objects gRPC call

Issue linked

#2156

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.72%. Comparing base (916da49) to head (9dd798a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2166   +/-   ##
=======================================
  Coverage   94.72%   94.72%           
=======================================
  Files         141      141           
  Lines       10319    10319           
=======================================
  Hits         9775     9775           
  Misses        544      544           

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