Move Array::serialize -> ArrayPlugin::Serialize

[gatesn]

The cheeky thing here is that now we require a VortexSession to serialize metadata:

1. Makes it hard to serialize arrays you didn't intend to. All arrays must be registered at least.
2. Allows ScalarFnArray to serialize metadata using a dedicated ArrayPlugin for that ScalarFn. So not all scalar function vtables need to define array serde semantics, they just register an optional plugin. This will allow us to port existing scalar arrays to scalar functions without a wire break

[codspeed]

Merging this PR will degrade performance by 21.67%

⚡ 2 improved benchmarks
❌ 2 regressed benchmarks
✅ 1118 untouched benchmarks
⏩ 1530 skipped benchmarks¹

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

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	varbinview_zip_fragmented_mask	6.4 ms	7.1 ms	-10.51%
❌	Simulation	varbinview_zip_block_mask	2.9 ms	3.7 ms	-21.67%
⚡	Simulation	old_alp_prim_test_between[f32, 32768]	268.1 µs	220.2 µs	+21.75%
⚡	Simulation	new_raw_prim_test_between[i32, 2048]	38.1 µs	33.9 µs	+12.57%

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_{Comparing ngates/plugin-serialize (bde3bde) with develop (1748d17)}

Footnotes

1. 1530 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. ↩

[connortsui20]

@claude review

[claude]

Claude encountered an error —— View job

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I'll analyze this and get back to you.

[connortsui20]

ship it (after lint fix and claude review)

[connortsui20]

@claude review

[claude]

Claude encountered an error —— View job

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I'll analyze this and get back to you.