feat: functionality implemented for RI pausing functionality

Currently, no CB pausing functionality has been implemented yet. This commit only includes necessary changes to use RI pausing.

ref: N25B-350

src/control_backend/agents/communication/ri_communication_agent.py

@@ -1,13 +1,16 @@
 import asyncio
 import json
 
+from pydantic import ValidationError
 import zmq
 import zmq.asyncio as azmq
 from zmq.asyncio import Context
 
 from control_backend.agents import BaseAgent
+from control_backend.core.agent_system import InternalMessage
 from control_backend.agents.actuation.robot_gesture_agent import RobotGestureAgent
 from control_backend.core.config import settings
+from control_backend.schemas.ri_message import PauseCommand
 
 from ..actuation.robot_speech_agent import RobotSpeechAgent
 from ..perception import VADAgent
@@ -296,3 +299,11 @@ class RICommunicationAgent(BaseAgent):
         self.logger.debug("Restarting communication negotiation.")
         if await self._negotiate_connection(max_retries=1):
             self.connected = True
+
+    async def handle_message(self, msg : InternalMessage):
+        try:
+            pause_command = PauseCommand.model_validate_json(msg.body)
+            self._req_socket.send_json(pause_command.model_dump())
+            self.logger.debug(self._req_socket.recv_json())
+        except ValidationError:
+            self.logger.warning("Incorrect message format for PauseCommand.")