Perf: use Stream.CopyTo and zero-copy MemoryPackagePart reads#1743

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ken-swyfft wants to merge 2 commits intonissl-lab:masterfrom

swyfft-insurance:perf/ks/20260321_streamhelper-buffer-memorypart-copy

Commits on Mar 21, 2026

Improve OPC stream I/O: use Stream.CopyTo and eliminate MemoryPackagePart copy

ken-swyfft
and
claude
committed

Commits on Mar 22, 2026

Merge branch 'master' into perf/ks/20260321_streamhelper-buffer-memorypart-copy
ken-swyfft
committed