refactor: Convolution

[alxkm]

Refactored the convolution method by replacing the while loop with a clearer for loop using explicit start and end indices for iteration, improving readability and reducing complexity.

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.62%. Comparing base (d55e89d) to head (bf440d7).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #6382   +/-   ##
=========================================
  Coverage     74.62%   74.62%           
  Complexity     5453     5453           
=========================================
  Files           682      682           
  Lines         19009    19010    +1     
  Branches       3670     3670           
=========================================
+ Hits          14185    14187    +2     
  Misses         4261     4261           
+ Partials        563      562    -1     

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