chore: revise sample project

[sakata1222]

• vup oss
• fix code smell reported by sonar. use supplier in logging

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.55%. Comparing base (66154b6) to head (e5def66).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #85   +/-   ##
=========================================
  Coverage     97.55%   97.55%           
  Complexity      272      272           
=========================================
  Files            40       40           
  Lines           655      655           
  Branches         16       16           
=========================================
  Hits            639      639           
  Misses           16       16           

Flag	Coverage Δ
unittests	97.55% <ø> (ø)

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