Improve backtest lazy loading and test automation

tests/e2e/test_playwright_server.py

@@ -11,8 +11,11 @@ from __future__ import annotations
 
 from pathlib import Path
 
+import pytest
 from playwright.sync_api import expect
 
+pytestmark = [pytest.mark.playwright, pytest.mark.e2e]
+
 ARTIFACTS = Path("tests/artifacts")
 ARTIFACTS.mkdir(parents=True, exist_ok=True)