Meadowlark - Full Query Support

Placeholder

Describe use of OpenSearch / Elasticsearch
- would be good to experiment with ES to make sure fully compatible
Pattern for populating data
- Initially: listener
- Then: kafka
case sensitivity problem:
- the queries are case insensitive on value, although case sensitive on keyIt looks like it is possible to setup Elasticsearch (and probably OpenSearch too) to have case insensitive key indexes as well.If that fails somehow, then we might end up needing to double-store in OpenSearch: a document that contains the lower-case form of the original item, and (compressed?) original form of the document. That way we return the original form, but always turn queries into lower case.