Customers would like to be able to generate UUID's per event they are processing to add identifiers for other down stream systems. We should enable UUID in stream processing to support this usecase.

s = {$source : {documents : [{test : 1}, {test : 2}]}}
af = {$addFields : { uuid : UUID(), 

Currently no good way to do this in Agg - https://mongodb.slack.com/archives/CC1SW4PA4/p1728486097136209?thread_ts=1728483695.767089&cid=CC1SW4PA4