chore: adjust message/command structure and write unit tests

ref: N25B-205

test/unit/agents/test_ri_commands_agent.py

@@ -4,7 +4,7 @@ import json
 import pytest
 from unittest.mock import AsyncMock, MagicMock, patch
 from control_backend.agents.ri_command_agent import RICommandAgent
-from control_backend.schemas.message import Message
+from control_backend.schemas.ri_message import SpeechCommand
 
 @pytest.mark.asyncio
 async def test_setup_bind(monkeypatch):
@@ -41,7 +41,7 @@ async def test_setup_connect(monkeypatch):
     fake_socket.connect.assert_any_call("tcp://localhost:5555")
 
 @pytest.mark.asyncio
-async def test_send_commands_behaviour_valid_message(caplog):
+async def test_send_commands_behaviour_valid_message():
     """Test behaviour with valid JSON message"""
     fake_socket = AsyncMock()
     message_dict = {"message": "hello"}
@@ -55,12 +55,14 @@ async def test_send_commands_behaviour_valid_message(caplog):
     behaviour = agent.SendCommandsBehaviour()
     behaviour.agent = agent
 
-    with caplog.at_level("INFO"):
+    with patch('control_backend.agents.ri_command_agent.SpeechCommand') as MockSpeechCommand:
+        mock_message = MagicMock()
+        MockSpeechCommand.model_validate.return_value = mock_message
+
         await behaviour.run()
 
     fake_socket.recv_multipart.assert_awaited()
-    fake_socket.send_json.assert_awaited()
-    assert "Received message" in caplog.text
+    fake_socket.send_json.assert_awaited_with(mock_message)
 
 @pytest.mark.asyncio
 async def test_send_commands_behaviour_invalid_message(caplog):