feat: add useful experiment logs

ref: N25B-401

src/control_backend/agents/perception/vad_agent.py

@@ -1,4 +1,6 @@
 import asyncio
+import logging
+import uuid
 
 import numpy as np
 import torch
@@ -12,6 +14,8 @@ from control_backend.schemas.internal_message import InternalMessage
 from ...schemas.program_status import PROGRAM_STATUS, ProgramStatus
 from .transcription_agent.transcription_agent import TranscriptionAgent
 
+experiment_logger = logging.getLogger(settings.logging_settings.experiment_logger_name)
+
 
 class SocketPoller[T]:
     """
@@ -252,6 +256,18 @@ class VADAgent(BaseAgent):
             if prob > prob_threshold:
                 if self.i_since_speech > non_speech_patience + begin_silence_length:
                     self.logger.debug("Speech started.")
+                    reference = str(uuid.uuid4())
+                    experiment_logger.chat(
+                        "...",
+                        extra={"role": "user", "reference": reference, "partial": True},
+                    )
+                    await self.send(
+                        InternalMessage(
+                            to=settings.agent_settings.transcription_name,
+                            body=reference,
+                            thread="voice_activity",
+                        )
+                    )
                 self.audio_buffer = np.append(self.audio_buffer, chunk)
                 self.i_since_speech = 0
                 continue