fix: Ensure OpenAI LLM supportability metrics are recorded on all invocations.

[tippmar-nr]

LLM supportability metrics for OpenAI instrumentation were not recorded in cases where validation of chat message input failed. This fix ensures that metrics are recorded prior to that validation.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.33%. Comparing base (a6ce55e) to head (42988bc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3320      +/-   ##
==========================================
- Coverage   82.33%   82.33%   -0.01%     
==========================================
  Files         495      495              
  Lines       32044    32044              
  Branches     3715     3715              
==========================================
- Hits        26384    26382       -2     
- Misses       4791     4792       +1     
- Partials      869      870       +1     

Flag	Coverage Δ
Agent	83.56% <ø> (-0.01%)	⬇️
Profiler	70.40% <ø> (ø)

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see 1 file with indirect coverage changes

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