Sentinel SLA

Hello,

I am wondering what service guarantees are provided by OpenZepplin sentinels?

I know that getting data from the chain is the guaranteed source of truth, but having OZ sentinels simplifies some designs for us. We would be sending message to SQS (AWS message queue) with the data on the state transition. Wondering how reliable this is and if it's possible for a contract event to get missed.

Thanks!