fix: clear stale pyc on start; correct email label-based extraction

start.sh

@@ -9,4 +9,7 @@ if [ ! -d ".venv" ]; then
     .venv/bin/playwright install chromium
 fi
 
+# Clear stale bytecode before each run to avoid executing outdated .pyc files
+find src -name "*.pyc" -delete 2>/dev/null || true
+
 PYTHONDONTWRITEBYTECODE=1 .venv/bin/python main.py "$@"