Fix flaky registration E2E test: increase redirect timeout

The registration test expects a redirect to /login after successful
registration, but the default 5s timeout is too short in CI. Increase
to 15s to account for slower backend response times under load.

Author: hut8

web/e2e/auth/register.test.ts

@@ -110,7 +110,7 @@ test.describe('Registration', () => {
 		console.log('Current URL after registration:', page.url());
 
 		// Should be redirected to login page with success message
-		await expect(page).toHaveURL(/\/login/);
+		await expect(page).toHaveURL(/\/login/, { timeout: 15000 });
 		await expect(page.getByText(/registration successful.*check your email/i)).toBeVisible();
 
 		// Verify that verification email was sent via Mailpit