SIENTIAPDE-1273

Update conftest.py to add a blank line for improved readability and code style consistency.

tests/conftest.py

@@ -5,6 +5,7 @@ This module mocks the 'sientia' module to avoid requiring its installation
 during unit tests. The mock is registered in sys.modules before any test
 imports are executed.
 """
+
 import sys
 from unittest.mock import MagicMock