release: prepare ZUPT 5.2.7 native test gates

packaging/rpm/zupt.spec

@@ -20,7 +20,7 @@
 # installed smoke test.
 
 Name:           zupt
-Version:        5.2.6
+Version:        5.2.7
 Release:        1%{?dist}
 Summary:        Backup compression with authenticated and post-quantum encryption
 
@@ -101,6 +101,11 @@ comments. Plain archives use non-cryptographic checksums.
 %endif
 
 %changelog
+* Mon Aug 31 2026 Cristian Cezar Moisés <sac@securityops.co> - 5.2.7-1
+- Correct native test integration: scope SHA-NI helpers away from macOS arm64
+  and preserve safe UTF-8 fixture bytes across the Windows argv boundary.
+- Preserve immutable, unpromoted 5.2.6 history and require fresh 5.2.7 gates.
+
 * Mon Aug 31 2026 Cristian Cezar Moisés <sac@securityops.co> - 5.2.6-1
 - Correct native release gates: use the secure volatile wipe fallback on
   macOS and NetBSD, support Bash 3.2 empty arrays in the source scanner, and