* Issue **#2688** : Add `metaTypes` to Proxy's `proxyRequestConfig`. Change data receipt to validate types against this new config property.

* Issue **#2688** : Change defaults for Strooms `metaTypes` config property. Change type of `metaTypes` from String to a Set of Strings. Change data receipt to validate against this configured set.

* Issue **#2694** : Improve error handling when search result store has reached max capacity.

* Issue **#2689** : Add logging.