astream_events

Forward astream_events to the bound runnable with bound kwargs merged.

For version="v3", returns an awaitable that resolves to the bound runnable's typed stream object (e.g. AsyncChatModelStream). For version="v1" / "v2", returns an async iterator over StreamEvent items.

Without this override, __getattr__ would drop self.kwargs — losing tools bound via bind_tools, stop sequences, etc.