* start org
* refactor(eventstore): filter in sql for querier
* feat(eventstore): Aggregate precondition
preconditions are checked right before insert. Insert is still transaction save
* feat(eventstore): check preconditions in repository
* test(eventstore): test precondition in models
* test(eventstore): precondition-tests
* refactor(eventstore): querier as type
* fix(precondition): rename validation from precondition to validation
* test(eventstore): isErr func instead of wantErr bool
* fix: delete org files
* remove comment
Co-authored-by: Livio Amstutz <livio.a@gmail.com>
