add chat_history json to the report upload (#3799)

Author: theomonnom

livekit-agents/livekit/agents/telemetry/traces.py

@@ -311,6 +311,12 @@ def _log(body: str, attributes: dict) -> None:
     part.headers["Content-Type"] = "application/protobuf"
     part.headers["Content-Length"] = str(len(header_bytes))
 
+    chat_history_json = json.dumps(report.chat_history.to_dict(exclude_timestamp=False))
+    part = mp.append(chat_history_json)
+    part.set_content_disposition("form-data", name="chat_history", filename="chat_history.json")
+    part.headers["Content-Type"] = "application/json"
+    part.headers["Content-Length"] = str(len(chat_history_json))
+
     if report.audio_recording_path and report.audio_recording_started_at:
         try:
             async with aiofiles.open(report.audio_recording_path, "rb") as f: