ARM64 SCA runner missing C header files (xxhash.h, usearch.h) causes go vet failure

[matrix-meow]

Problem

The SCA Test on Linux/arm64 job fails during go vet because CGO compilation cannot find required C header files:

bloom.c:24:10: fatal error: xxhash.h: No such file or directory
   24 | #include "xxhash.h"
      |          ^~~~~~~~~~

../../../go/pkg/mod/github.com/cpegeric/usearch/golang@.../lib.go:30:10: fatal error: usearch.h: No such file or directory
   30 | #include "usearch.h"
      |          ^~~~~~~~~~~

Recent Occurrences

Date	PR/Run	Job
2026-06-26	PR #25174	SCA Test on Linux/arm64

Root Cause

The ARM64 GitHub Actions runner does not have the thirdparty C libraries (xxhash, usearch) installed in thirdparties/install/include/ before go vet runs. The SCA job enables CGO (via CGO_CFLAGS="-I.../thirdparties/install/include"), but the include directory is empty or missing these headers.

This is related to the broader ARM64 runner environment setup issues (similar to Build job missing file command in run 27733163070).

Suggested Fix

1. Ensure ARM64 runner image includes xxhash and usearch headers
2. Or add a build step to compile/install thirdparty dependencies before running SCA on ARM64
3. Or skip CGO-dependent packages in ARM64 SCA (use -tags nocgo or exclude specific packages)