fix: default norms and goals should be lists

ref: N25B-299

src/control_backend/agents/llm/llm_instructions.py

@@ -5,17 +5,17 @@ class LLMInstructions:
     """
 
     @staticmethod
-    def default_norms() -> str:
-        return """
-        Be friendly and respectful.
-        Make the conversation feel natural and engaging.
-        """.strip()
+    def default_norms() -> list[str]:
+        return [
+            "Be friendly and respectful.",
+            "Make the conversation feel natural and engaging.",
+        ]
 
     @staticmethod
-    def default_goals() -> str:
-        return """
-        Try to learn the user's name during conversation.
-        """.strip()
+    def default_goals() -> list[str]:
+        return [
+            "Try to learn the user's name during conversation.",
+        ]
 
     def __init__(self, norms: list[str] = None, goals: list[str] = None):
         self.norms = norms or self.default_norms()