Push expressions through layout plans

[joseph-isaacs]

Superseded by #9196

The parent-reduction rule framework and all concrete expression-pushdown/plan-optimization rules are now one signed-off commit and one review unit in #9196.

No implementation was removed: the combined #9196 commit has the same Git tree as this PR's previous head. This PR is closed, and #9187 now targets vortex-plan-rules directly.

[codspeed-hq]

Merging this PR will regress 1 benchmark

⚡ 7 improved benchmarks
❌ 1 regressed benchmark
✅ 1954 untouched benchmarks
⏩ 89 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	-11.64%
⚡	Simulation	search_index_in_range_chunked	6.8 ms	5.6 ms	+21.96%
⚡	Simulation	slice_primitive_tight_loop[10000]	503.7 µs	420.1 µs	+19.88%
⚡	Simulation	search_index_above_max_chunked	5.6 ms	4.8 ms	+15.33%
⚡	Simulation	slice_dict_tight_loop[10000]	813.9 µs	715.9 µs	+13.68%
⚡	Simulation	take[small_m/shuffled/primitive/nonnull/chunks=1024/indices=1000]	6 ms	5.3 ms	+13.2%
⚡	Simulation	take[small_m/shuffled/primitive/nonnull/chunks=1024/indices=256]	2.3 ms	2 ms	+12.61%
⚡	Simulation	take[small_m/shuffled/primitive/nonnull/chunks=16384/indices=1000]	10 ms	9 ms	+11.1%

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 vortex-plan-optimizer (956389d) with vortex-plan-rules (82141f9)²}

Footnotes

1. 89 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 vortex-plan-rules (a1e7377) during the generation of this report, so f8ab498 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[joseph-isaacs]

Superseded by #9196. The parent-reduction rule API and all concrete expression-pushdown/plan-optimization rules are now one signed-off commit and one review unit in #9196. No implementation was dropped: the combined commit's tree is byte-for-byte identical to this PR's previous head.