test(gallery): verify the no-gallery-data prohibition by absence

JR-041 is a requirement to *not* do something, so like JR-021 it can only
be verified by absence. Mirrors the server's UR-012, which is preserved
the same way.

The check looks for any *parse* of gallery data — a field name, a
property, a type — not merely for network calls: an embedding arriving
here would mean SR-005 had already been breached upstream.

TRACES: JR-041 | SR-005

scripts/checks/no-gallery-data.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# JR-041 — the plugin never fetches, stores, or transmits gallery data.
+#
+# Like JR-021 this is a requirement to *not do* something, so it is verified by
+# absence. It mirrors the server's UR-012, which is preserved the same way: there
+# is no field capable of carrying an embedding or a crop, and no code that would
+# read one.
+#
+# The plugin's whole contact with identity is public identifiers (JR-007) and
+# scene windows (JR-004). A reference face or a 512-d vector arriving here would
+# mean SR-005 had been breached upstream, so the check is for any *parse* of one
+# — a field name, a property, a type — not merely for network calls.
+#
+# TRACES: JR-041 | SR-005
+set -euo pipefail
+
+cd "$(dirname "$0")/../.."
+roots=("Jellyfin.Plugin.JRay")
+status=0
+
+# Field and property names that would carry gallery data. Matched as whole words
+# so that unrelated identifiers containing them are not false positives.
+banned='\b(embedding|embeddings|face_crop|faceCrop|FaceCrop|reference_face|referenceFace|ReferenceFace|mugshot|Mugshot|gallery_vector|galleryVector|descriptor512|Embedding)\b'
+
+if grep -rn --include='*.cs' --include='*.js' -E "$banned" "${roots[@]}"; then
+    echo "FAIL (JR-041): a gallery-data field or type is referenced in the plugin." >&2
+    status=1
+fi
+
+# A base64 blob is the other shape this could arrive in. The plugin has no
+# legitimate reason to decode one: every string it handles is a name, an id, or
+# a URL.
+if grep -rn --include='*.cs' -E '\bConvert\.FromBase64String\b' "${roots[@]}"; then
+    echo "FAIL (JR-041): base64 decoding found — the plugin handles no binary payloads." >&2
+    status=1
+fi
+
+if [ "$status" -eq 0 ]; then
+    echo "OK (JR-041): no gallery-data code path."
+fi
+
+exit "$status"