fix!: use the probed threading layer to detect unsafe threads

[selmanozleyen]

fixes: #215

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.31%. Comparing base (0486005) to head (5d7e342).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #218      +/-   ##
==========================================
- Coverage   99.32%   99.31%   -0.02%     
==========================================
  Files          21       21              
  Lines         597      584      -13     
==========================================
- Hits          593      580      -13     
  Misses          4        4              

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[codspeed]

Merging this PR will degrade performance by 48.3%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

❌ 2 (👁 2) regressed benchmarks
✅ 230 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
👁	test_stats_benchmark[scipy.sparse.csr_array-2d-ax1-int32-is_constant]	299.9 ms	530.5 ms	-43.46%
👁	test_stats_benchmark[scipy.sparse.csc_array-2d-ax0-int32-is_constant]	306 ms	647.2 ms	-52.73%

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_{Comparing selmanozleyen:threading-layer-probe (5d7e342) with main (0486005)}

[flying-sheep]

You say this fixes #215 – does that mean we can delete code replicating numba’s layer selection?