Function fail_task

FullStackRust/backend/src/api/task.rs:148–158

(
    ddb_repo: Data<DDBRepository>, 
    task_identifier: Path<TaskIdentifier>
)

#[put("/task/{task_global_id}/fail")]
pub async fn fail_task(
    ddb_repo: Data<DDBRepository>, 
    task_identifier: Path<TaskIdentifier>
) -> Result<Json<TaskIdentifier>, TaskError> {
    state_transition(
        ddb_repo, 
        task_identifier.into_inner().task_global_id, 
        TaskState::Failed, 
        None
    ).await
}

#[put("/task/{task_global_id}/complete")]
pub async fn complete_task(