#467 (PERF1) made int_kernels::Isa a public type the C surface reaches, and the
header its branch carried predates it, so a build rewrote the header and left
the tree dirty (the HTTP falsify shards require a clean tree). This is the
header build.rs writes at the train's head: the opaque Isa typedef and two
blank lines of cbindgen's cfg handling. A second build, with no features and
with the falsify shards' (http, video_manifest, key_discovery), leaves it
unchanged.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
9406c5ae9f