feat: SSE add request failure event callback function #1041

[jeevatkm]

close: #1041

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.85%. Comparing base (3e7932d) to head (e7a2a6d).
⚠️ Report is 1 commits behind head on v3.

Additional details and impacted files

@@           Coverage Diff           @@
##               v3    #1076   +/-   ##
=======================================
  Coverage   99.85%   99.85%           
=======================================
  Files          18       18           
  Lines        3432     3447   +15     
=======================================
+ Hits         3427     3442   +15     
  Misses          3        3           
  Partials        2        2           

Flag	Coverage Δ
unittests	99.85% <100.00%> (+<0.01%)	⬆️

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