We are thinking what information do we need when it comes to chat messages when we are integrating with Symphony. Our initial plan is to store the chat room id (stream ID) then if we want to pull the messages then invoke below command:

MessageService#listMessages(@Nonnull String streamId, @Nonnull Instant since, @Nonnull PaginationAttribute pagination)

However, will these messages from a chat-room be kept forever or will there be a retention period? If there is retention period, then what is the value for such?

Would you recommend our initial approach or it is better to just save everything on our end though seems redundant to us.

Thank you