style: Format test_issue_219_e2e.py with ruff

Run ruff format to match code style standards.

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

tests/test_issue_219_e2e.py

@@ -25,6 +25,7 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "src"))
 # Check if anthropic is available
 try:
     import anthropic  # noqa: F401
+
     ANTHROPIC_AVAILABLE = True
 except ImportError:
     ANTHROPIC_AVAILABLE = False