Add simple processor to integration test

[cijothomas]

No description provided.

[cijothomas]

for reqwest-blocking, this can work without outside tokio too, will add a test to cover that also in a follow up PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.9%. Comparing base (27410b0) to head (bc1e600).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2522   +/-   ##
=====================================
  Coverage   77.9%   77.9%           
=====================================
  Files        123     123           
  Lines      22944   22944           
=====================================
  Hits       17880   17880           
  Misses      5064    5064           

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