Fix validate when redundant args & `getMemberChain`

[Huy-DNA]

Summary

• Fix the problem:

  Enum Person {
     id integer
  }

  go uncaught in the validator

• The old bug was because the optional setting list was not treated properly.
• Fix the error message of invalid enum field.
• Fix the uncaught error in this situation:

Issue

(issue link here)

Lasting Changes (Technical)

• getMemberChain takes ArrayNode into account
• Enum and Ref validator

Checklist

Please check directly on the box once each of these are done

• [ ] Documentation (if necessary)
• [X] Tests (integration test/unit test)
• [ ] Integration Tests Passed
• [ ] Code Review