Update AgentHealth when OnCommand returns error

[srikanthccv]

Fixes #186

[codecov]

Codecov Report

Attention: Patch coverage is 10.00000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 75.18%. Comparing base (efddaa2) to head (3f0b21b).
Report is 87 commits behind head on main.

Files with missing lines	Patch %	Lines
client/internal/receivedprocessor.go	10.00%	8 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #187      +/-   ##
==========================================
- Coverage   76.11%   75.18%   -0.94%     
==========================================
  Files          24       24              
  Lines        1834     1874      +40     
==========================================
+ Hits         1396     1409      +13     
- Misses        326      347      +21     
- Partials      112      118       +6     

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