fix: fix null value for codewhisperer percentage

[manodnyab]

Problem

Backend was getting errors as codewhispererPercentage should be double but in some places we are sending null which could be a string

Solution

Send 0 if value is null

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 60.79%. Comparing base (5896298) to head (6e31c9a).

Files with missing lines	Patch %	Lines
...whisperer/src/shared/telemetry/telemetryService.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2523      +/-   ##
==========================================
- Coverage   60.79%   60.79%   -0.01%     
==========================================
  Files         280      280              
  Lines       65578    65579       +1     
  Branches     4210     4211       +1     
==========================================
  Hits        39870    39870              
- Misses      25624    25625       +1     
  Partials       84       84              

Flag	Coverage Δ
unittests	60.79% <50.00%> (-0.01%)	⬇️

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