introduce lastIntendedSegmentBound to cursor management layer, method to checkAndHandleUploadCompletion

src/index.tsx

@@ -904,6 +904,7 @@ export type GetUploadStreamDetailsQuery = {
       __typename?: "UploadStreamGQL";
       isCompleted: boolean;
       uploadCompletionCursor: number;
+      lastIntendedSegmentBound?: number | null;
     } | null;
   };
 };
@@ -2372,6 +2373,7 @@ export const GetUploadStreamDetailsDocument = gql`
       stream {
         isCompleted
         uploadCompletionCursor
+        lastIntendedSegmentBound
       }
     }
   }

src/operations/video_upload.gql

@@ -65,6 +65,7 @@ query GetUploadStreamDetails($videoId: Int!) {
     stream {
       isCompleted
       uploadCompletionCursor
+      lastIntendedSegmentBound
     }
   }
 }