test: add skeleton tests/test_events_loader.py

Author: DiogoRibeiro7

tests/test_events_loader.py

@@ -0,0 +1,9 @@
+import importlib
+
+
+def test_import_events_loader():
+    mod = importlib.import_module("llm_observability_analytics.events.loader")
+    assert mod is not None
+
+
+# TODO: add file-based loader tests using tmp_path