Sync upstream Gemini-CLI v0.8.2 (#838)

integration-tests/vitest.config.ts

@@ -17,6 +17,12 @@ export default defineConfig({
     include: ['**/*.test.ts'],
     exclude: ['**/terminal-bench/*.test.ts', '**/node_modules/**'],
     retry: 2,
-    fileParallelism: false,
+    fileParallelism: true,
+    poolOptions: {
+      threads: {
+        minThreads: 2,
+        maxThreads: 4,
+      },
+    },
   },
 });