scalar_at take execution_ctx

[a10y]

Summary

This updates the OperationsVTable to inject an execution context for scalar_at.

This will allow the PatchedArray to execute a range of its indices child for linear search instead of issuing a scalar_at and cast in a loop.

[codspeed-hq]

Merging this PR will degrade performance by 16%

⚡ 2 improved benchmarks
❌ 3 regressed benchmarks
✅ 1101 untouched benchmarks
⏩ 1522 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	case_when_all_false[1000]	129.8 µs	108.7 µs	+19.44%
❌	Simulation	case_when_fragmented[100]	149.2 µs	167.6 µs	-10.98%
❌	Simulation	scalar_at_struct_wide	2.9 ms	3.4 ms	-16%
❌	Simulation	scalar_at_struct_simple	645.7 µs	759.5 µs	-14.98%
⚡	Simulation	decompress_alp[f32, (1000, 0.0, 1.0)]	10 µs	9 µs	+11.9%

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_{Comparing aduffy/scalar_at (09ae39e) with develop (7aa556a)²}

Footnotes

1. 1522 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on develop (8b83d7b) during the generation of this report, so 7aa556a was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩