feat: Support error code for single shot upload

[Tulsishah]

Fixes #694

It's a good idea to open an issue first for discussion.

• Tests pass
• Appropriate changes to README are included in PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.72%. Comparing base (61bce3c) to head (a1aff3c).
Report is 51 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #698      +/-   ##
==========================================
+ Coverage   98.69%   98.72%   +0.03%     
==========================================
  Files          50       50              
  Lines        8492     8623     +131     
==========================================
+ Hits         8381     8513     +132     
+ Misses        111      110       -1     

Flag	Coverage Δ
unittests	98.72% <100.00%> (+0.03%)	⬆️

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