async_cubits

• Added AsyncCubitsTrace.current to retrieve the current trace request id from the AsyncCubitsTrace zone

• Added AsyncCubitsTrace.generate() to create a trace request id, passed down through FutureCubit.performLoad/performRefresh and MutationCubit.invoke into AsyncCubitsLogger calls (AsyncCubitLoggerInfo/AsyncCubitLoggerError gain an optional traceId parameter)

• Breaking: MutationSuccess<T> is now MutationSuccess<I, T> — holds both the input passed to invoke and the result
• Breaking: onSuccess(T result) is now onSuccess(I input, T result)
• Breaking: MutationState factory constructors removed — use concrete classes directly (MutationIdle(), MutationLoading(), MutationSuccess(input, result), MutationFailure(error, stackTrace))

• Added AsyncCubitContainer.performDefault<T>() static shorthand for AsyncCubitContainer.defaultInstance.perform<T>()

• Breaking: AsyncCubitContainer.invalidate<T>() replaced by perform<T>({required runner, filter}) — accepts any BlocBase subtype and executes an arbitrary async runner on each matching cubit
• Breaking: MutationCubit.invalidate<T>() removed — use container.perform<T>(runner: (c) => c.invalidate()) inside onSuccess instead
• FutureCubit.invalidate gains optimisticRefresh parameter: emits an optimistic value immediately before the refresh fetch begins; no-op when reload: true

• AsyncCubitContainer now stores cubits in a List, allowing multiple instances of the same type to be registered simultaneously
• AsyncCubitContainer.invalidate<T>() now invalidates all registered cubits of type T (previously only one per type); accepts optional reload and filter parameters
• Removed AsyncCubitContainer.get<T>() and invalidateAll(List<Type>) — use invalidate<T>() directly

• Replaced freezed-based AsyncValue and MutationState with native Dart sealed classes — removes freezed_annotation and build_runner dependencies
• Merged FutureWithArgsCubit into FutureCubit: concrete subclasses now define their own load/refresh methods calling performLoad/performRefresh
• Removed RefreshStreamFutureCubitMixin

Add MutationCubit used to invoke async operations by some side effect (eg. form submit)

Create async_cubits package