fix: token cache exits after exhaustive retries

[alvarowolfx]

Towards #4541

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.02%. Comparing base (8690db5) to head (4b23384).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/auth/src/token_cache.rs	75.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4551      +/-   ##
==========================================
+ Coverage   95.01%   95.02%   +0.01%     
==========================================
  Files         195      195              
  Lines        7456     7458       +2     
==========================================
+ Hits         7084     7087       +3     
+ Misses        372      371       -1     

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