Use writev for netlink requests#1541
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Build netlink request headers and attributes as independent byte slices and send them with writev instead of copying them into fixed-size scratch buffers. Centralize netlink attribute header padding so callers assemble the request from explicit payload slices while preserving the expected aligned wire layout.
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Build netlink request headers and attributes as independent byte slices
and send them with writev instead of copying them into fixed-size
scratch buffers.
Centralize netlink attribute header padding so callers assemble the
request from explicit payload slices while preserving the expected
aligned wire layout.
This change is