feat: add removable reference feature vertical slice

scripts/test-performance.mjs

@@ -6,7 +6,7 @@ import process from "node:process";
 import { chromium } from "@playwright/test";
 
 import { evaluateLabBudget } from "../src/application/policies/performance-budgets.js";
-import { ROUTE_REGISTRY } from "../src/contracts/routes.js";
+import { ROUTE_REGISTRY } from "../src/features/installed-feature-contracts.js";
 
 const server = spawn(
   "corepack",
@@ -67,8 +67,9 @@ try {
       }).observe({ type: "layout-shift", buffered: true });
     });
     await page.goto(baseUrl, { waitUntil: "networkidle" });
-    const targetLabel =
-      ROUTE_REGISTRY.SAMPLE_RESOURCE_LIST.navigationLabel;
+    const targetLabel = Object.values(ROUTE_REGISTRY).find(
+      (definition) => definition.access === "integration-defined",
+    )?.navigationLabel;
     if (!targetLabel) {
       throw new Error("Performance route must be present in navigation.");
     }