823f9107fd
Adds gRPC command methods to GrpcCqrsApiClient for delivery operations: - completeDelivery: Mark delivery as completed with optional timestamp - markDeliveryAsUncompleted: Revert completed delivery to pending - skipDelivery: Skip a delivery that cannot be completed All methods follow the Result<T> pattern for consistent error handling, check CommandResponse.success flag, and map error messages appropriately. Co-Authored-By: Claude <noreply@anthropic.com>