enha: only set breadcrumb extras if not empty

[marandaneto]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

enha: only set breadcrumb extras if not empty

💡 Motivation and Context

sending empty extras is non sense

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• All tests passing

🔮 Next steps

[codecov-io]

Codecov Report

Merging #394 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #394   +/-   ##
=========================================
  Coverage     59.79%   59.79%           
  Complexity      789      789           
=========================================
  Files            89       89           
  Lines          3621     3621           
  Branches        350      350           
=========================================
  Hits           2165     2165           
  Misses         1304     1304           
  Partials        152      152           

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