feat: implemented pausing, implemented graceful stopping, removed old RI pausing code

ref: N25B-393

src/control_backend/agents/communication/ri_communication_agent.py

@@ -3,7 +3,6 @@ import json
 
 import zmq
 import zmq.asyncio as azmq
-from pydantic import ValidationError
 from zmq.asyncio import Context
 
 from control_backend.agents import BaseAgent
@@ -12,8 +11,6 @@ from control_backend.agents.perception.visual_emotion_recognition_agent.visual_e
     VisualEmotionRecognitionAgent,
 )
 from control_backend.core.config import settings
-from control_backend.schemas.internal_message import InternalMessage
-from control_backend.schemas.ri_message import PauseCommand
 
 from ..actuation.robot_speech_agent import RobotSpeechAgent
 from ..perception import VADAgent
@@ -335,12 +332,4 @@ class RICommunicationAgent(BaseAgent):
         self.logger.debug("Restarting communication negotiation.")
         if await self._negotiate_connection(max_retries=2):
             self.connected = True
-
-    async def handle_message(self, msg: InternalMessage):
-        return 
-        try:
-            pause_command = PauseCommand.model_validate_json(msg.body)
-            await self._req_socket.send_json(pause_command.model_dump())
-            self.logger.debug(await self._req_socket.recv_json())
-        except ValidationError:
-            self.logger.warning("Incorrect message format for PauseCommand.")
+