Fix tests (#593)

* Fix unit/integration/contract tests which were broken by messaging fabric work

tests/conftest.py

@@ -0,0 +1,50 @@
+"""
+Global pytest configuration for all tests.
+
+This conftest.py applies to all test directories.
+"""
+
+import pytest
+from unittest.mock import MagicMock
+
+
+@pytest.fixture(scope="session", autouse=True)
+def mock_loki_handler(session_mocker=None):
+    """
+    Mock LokiHandler to prevent connection attempts during tests.
+
+    This fixture runs once per test session and prevents the logging
+    module from trying to connect to a Loki server that doesn't exist
+    in the test environment.
+    """
+    # Try to import logging_loki and mock it if available
+    try:
+        import logging_loki
+        # Create a mock LokiHandler that does nothing
+        original_loki_handler = logging_loki.LokiHandler
+
+        class MockLokiHandler:
+            """Mock LokiHandler that doesn't make network calls."""
+            def __init__(self, *args, **kwargs):
+                pass
+
+            def emit(self, record):
+                pass
+
+            def flush(self):
+                pass
+
+            def close(self):
+                pass
+
+        # Replace the real LokiHandler with our mock
+        logging_loki.LokiHandler = MockLokiHandler
+
+        yield
+
+        # Restore original after tests
+        logging_loki.LokiHandler = original_loki_handler
+
+    except ImportError:
+        # If logging_loki isn't installed, no need to mock
+        yield