Unraid GraphQL schema drift detected

[github-actions]

The vendored schema/unraid-schema.graphql no longer matches
Unraid's published SDL (unraid/api@main).

Re-vendor it (copy the upstream file, re-add the provenance header),
then let the schema-contract test surface which queries/fixtures need
updating.

diff

--- vendored-body.graphql	2026-07-23 08:39:39.590313153 +0000
+++ upstream-schema.graphql	2026-07-23 08:39:39.581312973 +0000
@@ -1,4 +1,3 @@
-# ─────────────────────────────────────────────────────────────────────────────
 # ------------------------------------------------------
 # THIS FILE WAS AUTOMATICALLY GENERATED (DO NOT MODIFY)
 # ------------------------------------------------------