add header change to changeset

Author: adambenhassen

.changeset/two-baboons-tie.md

@@ -9,3 +9,5 @@ New CDN endpoints allow fetching schema artifacts for a specific version:
 - `/artifacts/v1/:targetId/version/:versionId/contracts/:contractName/:artifactType`
 
 Artifacts are now written to both the latest path and a versioned path during schema publish, enabling retrieval of historical versions.
+
+CDN artifact responses now include the `x-hive-schema-version-id` header, providing the version ID of the schema being served.