feat: personalize agent interaction with customer name

- Update prompt to use customer name for personalized greetings
- Pass state to tools via agent execution
- schedule_appointment now gets customer_id from state if not provided

src/naliiabot/bot/agent/agent.py

@@ -228,7 +228,7 @@ class Agent:
         tool_results: list[BaseMessage] = []
 
         for tool_call in last_message.tool_calls:
-            result = self._execute_tool(tool_call)
+            result = self._execute_tool(tool_call, state)
             tool_results.append(result)
 
             if self._post_tool_hook:
@@ -236,7 +236,7 @@ class Agent:
 
         return {"messages": state["messages"] + tool_results}
 
-    def _execute_tool(self, tool_call: dict) -> ToolMessage:
+    def _execute_tool(self, tool_call: dict, state: MessagesState) -> ToolMessage:
         """
         Ejecuta una herramienta individual con manejo de errores.
         """
@@ -253,6 +253,7 @@ class Agent:
 
         try:
             tool = self._tools_by_name[tool_name]
+            tool_args["state"] = state
             observation = tool.invoke(tool_args)
 
             return ToolMessage(