BUG: Recursive schemas are not handled correctly

Reproduction:

import { sample } from "openapi-sampler";

const recursive = {
  type: "object",
  properties: { human: { $ref: "#/definitions/person" } },
  definitions: {
    person: {
      type: "object",
      properties: {
        name: { type: "string" },
        friend: { $ref: "#/definitions/person" },
        friends: { type: "array", items: { $ref: "#/definitions/person" } },
      },
      required: ["name", "friends"],
    },
  },
}

const fromSampler = sample(recursive, {}, recursive);
console.log(fromSampler);

Reproduction Invalid Output

{ human: { name: 'string', friend: {}, friends: [ {} ] } }

Which is invalid according to the schema, the friends array should be either empty or contain one valid person and friend field should be either omitted or valid item.

Expected Output

Where friends array is just empty and friend item omitted.

{ human: { name: "string", friends: [] } }

Or where it contains one valid item:

{
  human: {
    name: "string",
    friend: { name: "string", friends: [] },
    friends: [{ name: "string", friends: [] }],
  },
}

Start by running the reproduction with sample from the package and compare the invalid and expected outputs. Trace recursive $ref handling, then verify that recursive friend and friends values are either omitted or empty, or contain valid person samples rather than invalid empty objects.