fix: Langfuse SDK v4 migration, tracing improvements, and LLM config

- Langfuse SDK v4: fix prompt-to-trace linking (as_type=generation)
- tracing: compile_prompt with Langfuse managed prompt fallback
- journey: remove journey CLI subcommand (keep only interactive)
- LLM: add service-specific llm modules for batch-agent and chat
- gitignore: exclude eval private test data
- config: add LANGFUSE settings to shared config

services/batch-agent/app/redis_consumer.py

@@ -138,6 +138,8 @@ async def _dispatch(user_id: str, message_data: dict[str, Any]) -> None:
         await _handle_journey_message(user_id, message_data)
     elif msg_type == "agent_trigger":
         await _handle_agent_trigger(user_id, message_data)
+    elif msg_type == "device_online":
+        logger.info("batch-agent: device_online user=%s device=%s", user_id, message_data.get("device_id", "?"))
     else:
         logger.warning("batch-agent: unknown message type %r from user=%s", msg_type, user_id)