fix: dont send empty image references list to exhort

[Strum355]

No description provided.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 18.18182% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.64%. Comparing base (def2904) to head (7a99e05).

Files with missing lines	Patch %	Lines
src/imageAnalysis.ts	14.28%	6 Missing ⚠️
src/imageAnalysis/diagnostics.ts	0.00%	3 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #845      +/-   ##
==========================================
- Coverage   64.00%   63.64%   -0.36%     
==========================================
  Files          32       32              
  Lines        1400     1411      +11     
  Branches      234      236       +2     
==========================================
+ Hits          896      898       +2     
- Misses        490      499       +9     
  Partials       14       14              

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