2.6.0 of springdoc-openapi-starter-webmvc-ui seems to introduce a regression when using @JsonUnwrapped & @Delegate

[NPE78]

Describe the bug

We are using models encapsulated with @JsonUnwrapped and @Delegate (from lombok) instead of using regular extends (favor composition over inheritance).

Before version 2.6.0 of springdoc-openapi-starter-webmvc-ui, we were using 2.5.0 (we're using renovatebot to ensure we're at the latest versions).

All the fields from the delegated model are missing.

To Reproduce
Steps to reproduce the behavior:

• What version of spring-boot you are using?
  3.3.2

• What modules and versions of springdoc-openapi are you using?
  springdoc-openapi-starter-webmvc-ui (the one which has been upgraded from 2.5.0 to 2.6.0)

• What is the actual and the expected result using OpenAPI Description (yml or json)?
  Expected: it should use all the fields from the two objects
  Actual: only the fields from the parent object are in the openapi documentation

• Provide with a sample code (HelloController) or Test that reproduces the problem

@Builder
@Jacksonized
public record AvailabilityDateRequest(LocalDate date,
                                      @JsonUnwrapped @Delegate AvailabilityRequest availabilityRequest) {

}

@Builder
@Jacksonized
public record AvailabilityRequest(List<String> data) {
}

Expected behavior

In this example, the generated documentation should contain date & data.
With 2.6.0, it contains only date

Screenshots
If applicable, add screenshots to help explain your problem.
N/A

Additional context
Add any other context about the problem here.

[wingsofovnia]

In my case, I was using @JsonUnwrapped in a Kotlin data class and the annotated field just disappeared from the schema. Reverting 2.5.0 fixes the issue.

[mtsfer]

Apparently, it's not the combination of @JsonUnwrapped and @Delegate. @JsonUnwrapped by itself is not being presented on documentation anymore.

[bnasslahsen]

This is duplicate of #2640, which should resolved for the next release.