[Python] How to set an end time for a LiveKit room and send a warning message 1 minute before...

I'm working with LiveKit and Python to manage a room where a multimodal agent participates in a conversation. I'd like to implement the following behavior:

Automatically disconnect the agent at a specified end time.

Send a message to agent 1 minute prior, to give a smooth wrap-up experience.

Is there a recommended way to schedule such a timed event in LiveKit using Python? Also, how would I send a message (e.g., a data packet or chat message) shortly before the disconnect?

Any guidance, example code, or best practices would be really appreciated!

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