Include optional parentId in comment.

Author: oyvind-wedoe

src/main/kotlin/no/nav/klage/document/api/CommentsController.kt

@@ -156,7 +156,8 @@ class CommentsController(
             ),
             comments = comment.comments.map { mapCommentToView(it) },
             created = comment.created,
-            modified = comment.modified
+            modified = comment.modified,
+            parentId = comment.parentCommentId,
         )
 
     private fun log(message: String) {

src/main/kotlin/no/nav/klage/document/api/views/CommentView.kt

@@ -9,7 +9,8 @@ data class CommentView(
     val author: Author,
     val comments: List<CommentView> = emptyList(),
     val created: LocalDateTime,
-    val modified: LocalDateTime
+    val modified: LocalDateTime,
+    val parentId: UUID?,
 ) {
     data class Author(
         val name: String,