Use aggregate descriptors for zoned stats

[gatesn]

This PR adds a new layout type: vortex.zoned

During deserialization, we read the old zone map layout vortex.stats into a vortex.zoned in memory.

The new zoned layout now stores aggregate descriptors instead of legacy Stat bits, enabling arbitrary aggregate functions to be used as zone statistics.

FLUPs:

• Move FooterStats over to using AggregateFns. Or even just a root-level ZonedLayout with a single zone?

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 11 improved benchmarks
❌ 7 regressed benchmarks
✅ 1563 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	decompress_rd[f64, (10000, 0.01)]	108.7 µs	138.8 µs	-21.73%
❌	Simulation	decompress_rd[f64, (10000, 0.1)]	109 µs	139.2 µs	-21.71%
❌	Simulation	decompress_rd[f64, (10000, 0.0)]	108.7 µs	138.8 µs	-21.7%
❌	Simulation	decompress_rd[f32, (100000, 0.0)]	496 µs	583.5 µs	-15%
❌	Simulation	decompress_rd[f32, (10000, 0.1)]	78.1 µs	90.3 µs	-13.56%
❌	Simulation	decompress_rd[f32, (10000, 0.01)]	78.1 µs	90.3 µs	-13.56%
❌	Simulation	decompress_rd[f32, (10000, 0.0)]	78.5 µs	90.8 µs	-13.52%
⚡	Simulation	take_10k_first_chunk_only	253.1 µs	208.2 µs	+21.55%
⚡	Simulation	decompress_rd[f64, (100000, 0.1)]	1,020.7 µs	842.5 µs	+21.15%
⚡	Simulation	decompress_rd[f64, (100000, 0.01)]	1,020.7 µs	842.5 µs	+21.15%
⚡	Simulation	take_10k_dispersed	266.6 µs	221.8 µs	+20.18%
⚡	Simulation	decompress_rd[f32, (100000, 0.1)]	582.9 µs	495 µs	+17.75%
⚡	Simulation	decompress_rd[f32, (100000, 0.01)]	582.9 µs	495 µs	+17.75%
⚡	Simulation	bitwise_not_vortex_buffer_mut[128]	244.4 ns	215.3 ns	+13.55%
⚡	Simulation	patched_take_10k_adversarial	260.9 µs	230.5 µs	+13.16%
⚡	Simulation	patched_take_10k_first_chunk_only	284.7 µs	254.4 µs	+11.92%
⚡	Simulation	patched_take_10k_dispersed	298.9 µs	268.6 µs	+11.28%
⚡	Simulation	bitwise_not_vortex_buffer_mut[1024]	304.7 ns	275.6 ns	+10.58%

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 ngates/stats-7707/aggregate-zoned-stats (02e7409) with develop (5d55fbc)}

[github-actions]

This PR has been marked as stale because it has been open for 14 days with no activity. Please comment or remove the stale label if you wish to keep it active, otherwise it will be closed in 7 days

[robert3005]

I think we can delete some of the old write path? We no longer seem to be using old stats accumulators