Enhance ThreadResourceUsageProvider setup and getCurrentThreadAllocatedBytes()

[Jackie-Jiang]

• Fix the setup of ThreadResourceUsageProvider so that enabling/disabling CPU/memory measurement is idempotent
• Use MXBean.getCurrentThreadAllocatedBytes() to read current thread allocated bytes when available. It is about 10% more efficient than MXBean.getThreadAllocatedBytes(long threadId)
• Enhance logging

[Copilot]

Pull request overview

This PR enhances the ThreadResourceUsageProvider class to make CPU and memory measurement enable/disable operations idempotent and improves performance by using getCurrentThreadAllocatedBytes() when available (approximately 10% more efficient than the previous approach). The changes include restructured initialization logic, enhanced logging, and updated benchmarks.

Changes:

• Refactored the static initialization block to properly detect and initialize reflection methods for thread resource measurement
• Modified setThreadCpuTimeMeasurementEnabled() and setThreadMemoryMeasurementEnabled() to be idempotent with improved logging
• Updated getCurrentThreadAllocatedBytes() to prefer getCurrentThreadAllocatedBytes() over getThreadAllocatedBytes(threadId) for better performance
• Simplified benchmark class and added new tests for enable/disable toggling

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
ThreadResourceUsageProvider.java	Core refactoring of initialization, enable/disable logic, and memory reading methods with enhanced logging
BenchmarkThreadResourceUsageProvider.java	Simplified benchmark structure with direct method calls instead of snapshot-based approach
TestThreadMXBean.java	Added new tests to verify idempotent behavior of enable/disable operations

[codecov-commenter]

Codecov Report

❌ Patch coverage is 41.48936% with 55 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.22%. Comparing base (0170477) to head (ae1e1f8).
⚠️ Report is 22 commits behind head on master.

Files with missing lines	Patch %	Lines
...ot/spi/accounting/ThreadResourceUsageProvider.java	41.48%	45 Missing and 10 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #17541      +/-   ##
============================================
- Coverage     63.24%   63.22%   -0.03%     
  Complexity     1476     1476              
============================================
  Files          3167     3170       +3     
  Lines        189250   189538     +288     
  Branches      28962    29007      +45     
============================================
+ Hits         119691   119833     +142     
- Misses        60273    60401     +128     
- Partials       9286     9304      +18     

Flag	Coverage Δ
custom-integration1	100.00% <ø> (ø)
integration	100.00% <ø> (ø)
integration1	100.00% <ø> (ø)
integration2	0.00% <ø> (ø)
java-11	63.19% <41.48%> (-0.02%)	⬇️
java-21	63.16% <41.48%> (-0.06%)	⬇️
temurin	63.22% <41.48%> (-0.03%)	⬇️
unittests	63.22% <41.48%> (-0.03%)	⬇️
unittests1	55.54% <39.36%> (-0.03%)	⬇️
unittests2	34.05% <24.46%> (+0.04%)	⬆️

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