fix(test): add timeout and update snapshot for yarn.lock migration tests

- Add setDefaultTimeout(5 minutes) to yarn-lock-migration.test.ts to
  prevent tests from timing out when they need network access
- Update snapshot to reflect the new behavior where unresolved required
  peer dependencies are added to optionalPeers in the lockfile

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

test/cli/install/migration/__snapshots__/yarn-lock-migration.test.ts.snap

@@ -288,6 +288,9 @@ exports[`yarn.lock migration basic migration with realistic complex yarn.lock: c
       "peerDependencies": {
         "react": ">=16.8.0",
       },
+      "optionalPeers": [
+        "react",
+      ],
     },
   },
   "packages": {

test/cli/install/migration/yarn-lock-migration.test.ts

@@ -1,8 +1,12 @@
-import { describe, expect, test } from "bun:test";
+import { beforeAll, describe, expect, setDefaultTimeout, test } from "bun:test";
 import fs from "fs";
 import { bunEnv, bunExe, tempDirWithFiles } from "harness";
 import { join } from "path";
 
+beforeAll(() => {
+  setDefaultTimeout(1000 * 60 * 5);
+});
+
 describe("yarn.lock migration basic", () => {
   test("simple yarn.lock migration produces correct bun.lock", async () => {
     const tempDir = tempDirWithFiles("yarn-migration-simple", {