Adds init playlist status

src/schema.gql

@@ -240,6 +240,7 @@ type UploadStreamGQL {
   segmentProcessingCursor: Int!
   lastIntendedSegmentBound: Int
   isCompleted: Boolean!
+  initPlaylistUploadStatus: InitPlaylistUploadStatusEnum
   lowestUnuploadedSegmentIndex: Int!
   uploadCompletionCursor: Int!
   errors: [StreamErrorGQL!]!
@@ -248,6 +249,12 @@ type UploadStreamGQL {
   segments: [UploadSegmentGQL!]!
 }
 
+enum InitPlaylistUploadStatusEnum {
+  NOT_APPLICABLE
+  NOT_UPLOADED
+  UPLOADED
+}
+
 type StreamErrorGQL {
   message: String!
 }