fix:planner AttributeError 'list' object has no attribute 'get' (#436)

src/graph/nodes.py

@@ -134,7 +134,7 @@ def planner_node(
             return Command(goto="reporter")
         else:
             return Command(goto="__end__")
-    if curr_plan.get("has_enough_context"):
+    if isinstance(curr_plan, dict) and curr_plan.get("has_enough_context"):
         logger.info("Planner response has enough context.")
         new_plan = Plan.model_validate(curr_plan)
         return Command(