refactor(enhancement): use std lib functions

[jeevatkm]

• curl cmd request body error scenario and removed pointer on string
• redirect add error prefix and remove default header
• test case additions

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.11%. Comparing base (f18ee43) to head (50c48eb).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #912      +/-   ##
==========================================
+ Coverage   98.79%   99.11%   +0.32%     
==========================================
  Files          15       15              
  Lines        3230     3290      +60     
==========================================
+ Hits         3191     3261      +70     
+ Misses         28       20       -8     
+ Partials       11        9       -2     

Flag	Coverage Δ
unittests	99.11% <100.00%> (+0.32%)	⬆️

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