The canary fixtures intentionally pin known-vulnerable deps (jinja2 2.11.2,
lodash 4.17.15) so the checker has something to detect. GitHub's dependency
graph parsed those fixture manifests as real project deps, failing the
dependency-review PR gate (fail-on-severity: high). Store the manifests with a
.fixture suffix so the dependency graph ignores them; the --canary materializer
strips the suffix in its temp work area before scanning, so detection is
unchanged (still 2/2). No advisory allowlist, no change to the shared org
reusable workflow — the real gate stays strict for actual deps.
