Plugin suggests that ABI dependencies are unused while they are needed for both compile

[mvegter]

Plugin version
main@ccaadc5fc86155f57650325784d6f105afe1be9b / 0.78.1-snapshot

Gradle version
7.2

Describe the bug

> Task :impl:projectHealth
Unused dependencies which should be removed:
  api(project(":abstract"))

To Reproduce
abstract/src/main/java/IPermission.java

public interface IPermission {
    String name();
    boolean isAdmin();
    default Object getLogging() {
        return name();
    }
}

impl/src/main/java/WebPermission.java

public enum WebPermission implements IPermission {

    ViewData(false),
    EditData(true),
    ;

    private final boolean superRole;

    WebPermission(boolean superRole) {
        this.superRole = superRole;
    }

    @Override
    public boolean isAdmin() {
        return superRole;
    }

}

Expected behavior
Do not suggest changing the dependency api project(':abstract') for the :impl project to unused. As removing this dependency won't compile the project.

Additional context
Changing the dependency from api to implementation will cause upstream issue, e.g. Cannot access IPermission

[autonomousapps]

I know I've been sitting on this one for a while, but it's because I find it terribly confusing. This issue suggests a really crazy bug that multiple regression tests ought to prevent. I appreciate the issue and the PR, and will take a look when I can.