test: harden starter experience quality contract

scripts/write-a11y-report.mjs

@@ -1,5 +1,7 @@
 import { mkdir, writeFile } from "node:fs/promises";
 
+import { MANUAL_A11Y_ROUTE_IDS } from "./lib/manual-a11y-evidence.mjs";
+
 await mkdir("artifacts/tests", { recursive: true });
 await writeFile(
   "artifacts/tests/a11y.json",
@@ -7,7 +9,7 @@ await writeFile(
     {
       schemaVersion: 1,
       generatedAt: new Date().toISOString(),
-      scope: ["APP_HOME", "SAMPLE_RESOURCE_LIST", "NOT_FOUND"],
+      scope: MANUAL_A11Y_ROUTE_IDS,
       threshold: { critical: 0, serious: 0 },
       automatedStatus: "passed",
       manualReview: "see artifacts/tests/a11y-manual/report.json",