Simplify the boilerplate

Signed-off-by: William Fu-Hinthorn <13333726+hinthornw@users.noreply.github.com>

tests/unit_tests/test_configuration.py

@@ -1,5 +1,9 @@
-from agent.configuration import Configuration
+from langgraph.pregel import Pregel
+
+from agent.graph import graph
 
 
-def test_configuration_empty() -> None:
-    Configuration.from_runnable_config({})
+def test_placeholder() -> None:
+    # TODO: You can add actual unit tests
+    # for your graph and other logic here.
+    assert isinstance(graph, Pregel)