chore: Added systemlabel to graphql (#1236)

## Description

Added systemLabel to graphQL

## Related Issue(s)

## Verification

- [x] **Your** code builds clean without any errors or warnings
- [x] Manual testing done (required)
- [ ] Relevant automated test added (if you find this hard, leave it and
we'll help out)

## Documentation

- [ ] Documentation is updated (either in `docs`-directory, Altinnpedia
or a separate linked PR in
[altinn-studio-docs.](https://github.com/Altinn/altinn-studio-docs), if
applicable)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced a new `systemLabel` field to the `Dialog` type, enhancing
metadata associated with each dialog.


<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: Amund Myrbostad <amund.myrbostad@digdir.no>

docs/schema/V1/schema.verified.graphql

@@ -110,6 +110,7 @@ type Dialog {
   createdAt: DateTime!
   updatedAt: DateTime!
   dialogToken: String
+  systemLabel: SystemLabel!
   status: DialogStatus!
   content: Content!
   attachments: [Attachment!]!
@@ -391,4 +392,4 @@ scalar DateTime @specifiedBy(url: "https:\/\/www.graphql-scalars.com\/date-time"
 
 scalar URL @specifiedBy(url: "https:\/\/tools.ietf.org\/html\/rfc3986")
 
-scalar UUID @specifiedBy(url: "https:\/\/tools.ietf.org\/html\/rfc4122")
+scalar UUID @specifiedBy(url: "https:\/\/tools.ietf.org\/html\/rfc4122")

src/Digdir.Domain.Dialogporten.GraphQL/EndUser/DialogById/ObjectTypes.cs

@@ -1,4 +1,5 @@
 using Digdir.Domain.Dialogporten.GraphQL.EndUser.Common;
+using Digdir.Domain.Dialogporten.GraphQL.EndUser.MutationTypes;
 
 namespace Digdir.Domain.Dialogporten.GraphQL.EndUser.DialogById;
 
@@ -50,6 +51,8 @@ public sealed class Dialog
 
     public string? DialogToken { get; set; }
 
+    public SystemLabel SystemLabel { get; set; }
+
     public DialogStatus Status { get; set; }
 
     public Content Content { get; set; } = null!;