Fixes: #16676
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* Enhance DefaultModelCriteria
* Fix collection
* Fix delete in CHMKeycloakTransaction
* Add HasRealmId interface
* Fix EntityFieldDelegate
* Support for realm-less entities in providers
* Support for realm-less entities in providers (events)
* File store basis
* Add support for writing
* Support running KeycloakServer with file store
* Add support for file store in model testsuite
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Co-authored-by: vramik <vramik@redhat.com>
