Make FHE PublicKey, PaddingStrategy and ZeroPaddingStrategy jackson serializable
Merge branch 'feature/client-persistence' of github.com:kryptnostic/fhe-core into feature/client-persistence

* 'feature/client-persistence' of github.com:kryptnostic/fhe-core:
  Added dense random function.
  Fixed bug with squaring matrix test and impl
  Simplified encrypted search private key