feat: Add LangChain error events capture

[jsumners-nr]

This PR resolves issue #1969.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.16%. Comparing base (b9c73ca) to head (08f879e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2040   +/-   ##
=======================================
  Coverage   97.15%   97.16%           
=======================================
  Files         248      248           
  Lines       41600    41648   +48     
=======================================
+ Hits        40418    40466   +48     
  Misses       1182     1182           

Flag	Coverage Δ
integration-tests-16.x	78.51% <12.19%> (-0.08%)	⬇️
integration-tests-18.x	78.47% <12.19%> (-0.09%)	⬇️
integration-tests-20.x	78.48% <12.19%> (-0.07%)	⬇️
unit-tests-16.x	90.81% <17.07%> (-0.08%)	⬇️
unit-tests-18.x	90.79% <17.07%> (-0.08%)	⬇️
unit-tests-20.x	90.79% <17.07%> (-0.08%)	⬇️
versioned-tests-16.x	74.91% <14.63%> (-0.09%)	⬇️
versioned-tests-18.x	75.50% <100.00%> (+0.02%)	⬆️
versioned-tests-20.x	75.51% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[bizob2828]

The LlmTool and LlmChatCompletionSummary need an error attribute set to true when an error occurs. Also we can cut a separate PR but it looks like i missed calling out is_response on LlmChatCompletionMessage when the content is the response.

[bizob2828]

We can open another PR to capture the is_response on LlmChatCompletionMessage as its unrelated to this PR