feat: When tracing is enabled use the span from the scope of the run

[uttarayan21]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 38.43%. Comparing base (4daae13) to head (83a5851).

Files with missing lines	Patch %	Lines
src/interpreter.rs	0.00%	5 Missing ⚠️
src/backend.rs	0.00%	3 Missing ⚠️
src/tensor/raw.rs	0.00%	3 Missing ⚠️
src/tensor.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #12      +/-   ##
==========================================
+ Coverage   38.24%   38.43%   +0.19%     
==========================================
  Files          12       12              
  Lines        1820     1824       +4     
==========================================
+ Hits          696      701       +5     
+ Misses       1124     1123       -1     

Flag	Coverage Δ
unittests	38.43% <0.00%> (+0.19%)	⬆️

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[K-prog]

average tracer
lgtm: be safe next time 🙏