feat(workers): Define WorkerState for the Researcher subgraph

backend/tests/test_researcher_state.py

@@ -0,0 +1,13 @@
+from typing import get_type_hints, List
+from ea_chatbot.graph.workers.researcher.state import WorkerState
+
+def test_researcher_worker_state():
+    """Verify that Researcher WorkerState has the required fields."""
+    hints = get_type_hints(WorkerState)
+    
+    assert "messages" in hints
+    assert "task" in hints
+    assert "queries" in hints
+    assert "raw_results" in hints
+    assert "iterations" in hints
+    assert "result" in hints