feat(vortex-array): execute primitive interleave arrays

[HarukiMoriarty]

Summary

• execute Interleave arrays whose values use primitive dtypes
• gather from canonical primitive buffers while preserving constant value sources
• share selector length and bounds validation with the Boolean kernel
• cover nullable primitive columns, constants, null constants, and invalid selectors

Motivation

Interleave previously only had an execution kernel for Boolean values. This adds the corresponding primitive kernel as a general vortex-array capability. Spatial MakeLine uses this support in the separate stacked PR #9201.

[codspeed-hq]

Merging this PR will regress 1 benchmark

⚡ 2 improved benchmarks
❌ 1 regressed benchmark
✅ 1934 untouched benchmarks
⏩ 85 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	cold_misaligned[(64, 256)]	4.4 ms	5 ms	-12.59%
⚡	Simulation	decompress[u64, (1000, 16)]	72.2 µs	64.6 µs	+11.81%
⚡	Simulation	compress_fsst[(1000, 64, 8)]	1.1 ms	1 ms	+11.73%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing nemo/interleave-primitive-execution (6ad96f8) with develop (19f771f)}

Footnotes

1. 85 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. ↩