Handle failed benchmarks

[martincostello]

Fix error if a benchmark has failed and has no Statistics.

Found via martincostello/aspnetcore-openapi#231.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.85%. Comparing base (c9e0171) to head (e2d9511).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #266      +/-   ##
==========================================
+ Coverage   84.68%   84.85%   +0.17%     
==========================================
  Files           2        2              
  Lines         346      350       +4     
  Branches       79       83       +4     
==========================================
+ Hits          293      297       +4     
  Misses         52       52              
  Partials        1        1              

Flag	Coverage Δ
linux	84.85% <100.00%> (+0.17%)	⬆️
macos	84.85% <100.00%> (+0.17%)	⬆️
windows	84.85% <100.00%> (+0.17%)	⬆️

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[Copilot]

Pull Request Overview

This PR updates the benchmark publishing logic to handle cases where a benchmark fails and no Statistics are available.

• Introduces fallback values for benchmarks with missing Statistics in the publisher.
• Adds a failing benchmark test fixture and an associated test case to verify proper handling.

Reviewed Changes

Copilot reviewed 5 out of 8 changed files in this pull request and generated 1 comment.

File	Description
tests/fixtures/failing-benchmark/BenchmarkDotNet.Artifacts/results/TodoApp.OpenApiBenchmarks-report-github.md	Adds a new test fixture report for a failing benchmark scenario
src/BenchmarksPublisher.ts	Updates logic to use fallback values for missing Statistics in benchmarks
tests/main.test.ts	Adds a test case for the failing benchmark scenario

Files not reviewed (3)

• tests/snapshots/main.test.ts.snap: Language not supported
• tests/fixtures/failing-benchmark.json: Language not supported
• tests/fixtures/failing-benchmark/BenchmarkDotNet.Artifacts/results/TodoApp.OpenApiBenchmarks-report-full-compressed.json: Language not supported