fix(resolve): release cancelled previews and preserve task ownership

ui/flutter/lib/api/model/resolve_task.dart

@@ -8,7 +8,10 @@ part 'resolve_task.g.dart';
 class ResolveTask {
   Request? req;
 
-  ResolveTask({this.req});
+  @JsonKey(includeIfNull: false)
+  String? id;
+
+  ResolveTask({this.req, this.id});
 
   factory ResolveTask.fromJson(Map<String, dynamic> json) => _$ResolveTaskFromJson(json);
   Map<String, dynamic> toJson() => _$ResolveTaskToJson(this);