Release 9.4.0-beta1

Merge branch 'develop'

* develop:
  Release a beta version for testing new Query Candidates.
  Adding more helper functions to Candidates class.
  Making sure we accept that candidates can be null due to ProtoBuf initialization.
  Adding a new IQueryInterface that will strictly implement method that are required by the query engine.
  Implementing a more efficient query, specifically handling the use-case when we have very large queries with very long matches.
  Nested if makes more sense here.