fix(client): retry on server errors

[jharley]

Have the V1 API Client retry on 500-class errors like the V2 client.

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.04%. Comparing base (bec5669) to head (7b47e06).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
client/client.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #571      +/-   ##
==========================================
- Coverage   76.05%   76.04%   -0.01%     
==========================================
  Files          86       86              
  Lines        7107     7105       -2     
==========================================
- Hits         5405     5403       -2     
  Misses       1368     1368              
  Partials      334      334              

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