avoid including experimental encoding in footer

[a10y]

Summary

We have been publishing a footer reference to vortex.patched experimental encoding in the last few releases.

The issue is that we should not be including the Patched encoding in the default array context

This removes Patched from the default array context, instead registering it conditionally where we register the other unstable encodings.

I've verified that after this change writing a file with default settings no longer includes Patched encoding

[codspeed-hq]

Merging this PR will degrade performance by 16.63%

❌ 10 regressed benchmarks
✅ 1153 untouched benchmarks
⏩ 1462 skipped benchmarks¹

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

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	take_map[(0.1, 0.5)]	973 µs	1,082 µs	-10.07%
❌	Simulation	take_map[(0.1, 1.0)]	1.6 ms	1.9 ms	-15.11%
❌	Simulation	patched_take_10k_contiguous_not_patches	228.2 µs	258.8 µs	-11.81%
❌	Simulation	patched_take_10k_contiguous_patches	227.9 µs	258.4 µs	-11.83%
❌	Simulation	patched_take_10k_random	240.1 µs	270.7 µs	-11.31%
❌	Simulation	take_10k_dispersed	239.7 µs	284.8 µs	-15.84%
❌	Simulation	take_10k_first_chunk_only	225.8 µs	270.9 µs	-16.63%
❌	Simulation	patched_take_10k_first_chunk_only	271.9 µs	302.4 µs	-10.08%
❌	Simulation	decompress_rd[f64, (100000, 0.01)]	2 ms	2.3 ms	-13.4%
❌	Simulation	decompress_rd[f64, (100000, 0.1)]	2 ms	2.3 ms	-13.4%

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_{Comparing aduffy/array-ctx-fix (94fd25f) with develop (f77cf60)}

Footnotes

1. 1462 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. ↩

[a10y]

I deleted the patched.vortex compat files for now and will re-enable them once we stabilize