fix: increase e2e test parallelism and timeout for CI

- Use 4 workers instead of 1 in CI for faster execution
- Increase globalTimeout from 5 to 20 minutes for 1318 tests
- With 4 workers, full test suite should complete in ~15 minutes

e2e/playwright.config.ts

@@ -18,12 +18,12 @@ export default defineConfig({
   forbidOnly: !!process.env.CI,
   /* Retry on CI only */
   retries: process.env.CI ? 2 : 0,
-  /* Opt out of parallel tests on CI. */
-  workers: process.env.CI ? 1 : undefined,
+  /* Run with limited parallelism in CI to balance speed and stability */
+  workers: process.env.CI ? 4 : undefined,
   /* Maximum time one test can run */
   timeout: 30 * 1000,
-  /* Maximum time for entire test run */
-  globalTimeout: 5 * 60 * 1000,
+  /* Maximum time for entire test run (1318 tests with 4 workers ~15 minutes) */
+  globalTimeout: 20 * 60 * 1000,
   /* Reporter to use. See https://playwright.dev/docs/test-reporters */
   reporter: process.env.CI
     ? [['list']]