fix[vortex-array]: fix offset_within_chunk underflow on patches array

[asubiotto]

slice_start_idx was missing normalization to absolute coordinates.

Summary

Testing

[codspeed-hq]

Merging this PR will improve performance by 20.89%

⚡ 1 improved benchmark
✅ 1121 untouched benchmarks
⏩ 1530 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	chunked_bool_canonical_into[(1000, 10)]	60.3 µs	49.9 µs	+20.89%

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_{Comparing asubiotto/patches (f29c09b) with develop (951bdf9)}

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. ↩

[robert3005]

Thanks for explaining it to me