feat(async/unstable): add unstable circuit breaker

[tomas-zijdemans]

No description provided.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.17%. Comparing base (6ee055f) to head (d70bb83).
⚠️ Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6900      +/-   ##
==========================================
+ Coverage   94.14%   94.17%   +0.03%     
==========================================
  Files         582      583       +1     
  Lines       42750    43010     +260     
  Branches     6807     6861      +54     
==========================================
+ Hits        40245    40505     +260     
  Misses       2455     2455              
  Partials       50       50              

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[kt3k]

Looks well documented and tested. Let's try this module. Thanks for your contribution!