Array entries are not validated against reference-style item types

[idg10]

Given a schema of this form:

- type: array
  items:
    $ref: '#/components/schemas/SomeType'

Menes will validate that items of this schema type are arrays, but it will not validate that the items in the array match the schema referred to.

It does correctly validate array item types if the schema is written out inline inside the items section. This appears to be specific to the use of $ref in this context.

It's possible there is a bug in Microsoft.OpenApi: the basic problem here is that the OpenApiSchema.Items property is not resolving the reference for us. In most cases, is does—there's very little (no?) code in Menes that explicitly resolves $ref references because on the Open API library normally seems to do it for us.

[idg10]

Added 878e648 on https://github.com/menes-dotnet/Menes/tree/feature/140-array-items-validation - adds tests that demonstrate the failure. Specifically:

878e648#diff-37578961ed808205d1aa6b557e439f3bR45-R59