fix(FN-4813): avoid isolation transition double-write in project route

Fusion-Task-Id: FN-4813
Fusion-Task-Lineage: 846893a5-2afa-4817-8f64-8c444d2fd713

packages/dashboard/src/routes/register-project-routes.ts

@@ -615,6 +615,7 @@ export const registerProjectRoutes: ApiRouteRegistrar = (ctx) => {
                 activeTaskCount: transition.activeTaskCount ?? 0,
               });
             }
+            delete updates.isolationMode;
           } else {
             transitionDeferred = true;
           }