Investigate enrichment policies in OpenSearch for related works/clients/events

[jrhoads]

In our OpenSearch indices/documents we often include indexed information from other models
Ex: Dois have information on clients, and providers
Currently we do this manually as part of the index process before it is sent to OpenSearch.
OpenSearch (and Elasticsearch) have mechanisms to enrich data as it comes in, pulling from other indices

https://elasticsearch.evermight.com/enrich-data-with-elasticsearch-part-1/

We could investigate this for Doi indices as noted above who need to pull in Client info
We could also investigate pulling Doi information into Events