Add additional context and markup to the docs for the scenario where a non-primitive field is used as a part of a composite key
Add additional context and markup to the docs for the scenario where a non-primitive field is used as a part of a composite key

Yelp/elastalert,jetyang2005/elastalert,rprabhat/elastalert,jetyang2005/elastalert,jetyang2005/elastalert,ltagliamonte/elastalert,dvopsway/elastalert