fix(sdk-trace): sample ratio 1 upper-bound trace IDs

[LarryHu0217]

Summary

• Fix TraceIdRatioBasedSampler(1) so trace IDs whose accumulated value is 0xffffffff are sampled.
• Keep the existing strict < comparison by using an exclusive upper bound of 0x100000000 when the normalized ratio is 1.
• Add a regression assertion for the ffffffff boundary trace ID.

Fixes #6879.

Testing

• npm run compile --workspace @opentelemetry/sdk-trace
• npm run test --workspace @opentelemetry/sdk-trace -- --grep TraceIdRatioBasedSampler
• npm run lint --workspace @opentelemetry/sdk-trace (passes with existing no-console warnings in benchmark files)

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: LarryHu0217 / name: Liang Hu (499fcc5)

[LarryHu0217]

I have signed that CLA

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.08%. Comparing base (0fd7fac) to head (8cc5862).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6890   +/-   ##
=======================================
  Coverage   95.08%   95.08%           
=======================================
  Files         394      394           
  Lines       13992    13993    +1     
  Branches     3223     3224    +1     
=======================================
+ Hits        13304    13305    +1     
  Misses        688      688           

Files with missing lines	Coverage Δ
.../sdk-trace/src/sampler/TraceIdRatioBasedSampler.ts	100.00% <100.00%> (ø)

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[pichlermarc]

thanks!

[otelbot]

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