## Validator Changes

* Fix issues with multiple terminology servers (should be live soon)
* Rework terminology system & cache to support new terminology server ecosystem
* Handle value set with exclusion filters when expanding
* Fix to consistent error messages when value sets can't be resolved

## Other code changes

* Fix bug processing empty structure maps
* Performance improvements to common IO routines, with test cases - see https://blog.qligier.ch/posts/2024-improving-perf-ig-publisher-io/ (thanks to Quentin Ligier)