Problem with inline object within additionalProperties

The following example (taken from the schema of the CRD https://github.com/argoproj/argo-cd/blob/41f54aa556f3ffb3fa4cf93d784fb7d30c15041c/manifests/crds/appproject-crd.yaml):

```yaml
openapi: 3.0.1
info:
title: Whatever
version: 1.0.0
paths: { }
components:
schemas:
status:
description: AppProjectStatus contains status information for AppProject
CRs
properties:
jwtTokensByRole:
additionalProperties:
description: JWTTokens represents a list of JWT tokens
properties:
items:
items:
description: JWTToken holds the issuedAt and expiresAt values
of a token
properties:
exp:
format: int64
type: integer
iat:
format: int64
type: integer
id:
type: string
required:
- iat
type: object
type: array
type: object
description: JWTTokensByRole contains a list of JWT tokens issued
for a given role
type: object
type: object
```

generates this code:

```scala
case class Status(jwtTokensByRole: Option[Map[String, Status.JwtTokensByRole]] = None)
object Status {
implicit val encodeStatus: _root_.io.circe.Encoder.AsObject[Status] = {
val readOnlyKeys = _root_.scala.Predef.Set[_root_.scala.Predef.String]()
_root_.io.circe.Encoder.AsObject.instance[Status](a => _root_.io.circe.JsonObject.fromIterable(_root_.scala.Vector(("jwtTokensByRole", a.jwtTokensByRole.asJson)))).mapJsonObject(_.filterKeys(key => !(readOnlyKeys contains key)))
}
implicit val decodeStatus: _root_.io.circe.Decoder[Status] = new _root_.io.circe.Decoder[Status] { final def apply(c: _root_.io.circe.HCursor): _root_.io.circe.Decoder.Result[Status] = for (v0 <- c.downField("jwtTokensByRole").as[Option[Map[String, Status.JwtTokensByRole]]]) yield Status(v0) }
}
```

in which `Status.JwtTokensByRole` is missing.

Start with the OpenAPI example from the Argo CD CRD and compare it with the generated Status code shown in the issue. Trace how inline objects under additionalProperties are handled; done means the nested Status.JwtTokensByRole type is generated and the resulting Scala output compiles.

Written by the indexing model from the issue text.