Function _db_attach

Attach to an existing session's SSE stream without sending a message. Streams all incoming events to stdout in real-time using the same formatting as _stream_response. Useful for: - Watching an ongoing analysis - Replaying the last round to review a plan before confirming

(
    sse_client: SSEClient,
    file_manager: FileManager,
    session,
    from_start: bool = False,
    checkpoint: Optional[int] = None,
    output_mode: str = "summary",
)