Model 内所有写操作为什么都默认开启事务

RT，这个是基于什么考虑

   /**
     * 删除当前的记录
     * @access public
     * @return bool
     */
    public function delete(): bool
    {
        if (!$this->exists || $this->isEmpty() || false === $this->trigger('BeforeDelete')) {
            return false;
        }

        // 读取更新条件
        $where = $this->getWhere();

        $db = $this->db();

        $db->transaction(function () use ($where, $db) {
            // 删除当前模型数据
            $db->where($where)->delete();

            // 关联删除
            if (!empty($this->relationWrite)) {
                $this->autoRelationDelete();
            }
        });

        $this->trigger('AfterDelete');

        $this->exists   = false;
        $this->lazySave = false;

        return true;
    }

The issue provides the model delete() method and its db->transaction call; start there and trace how the transaction surrounds the model and relationWrite operations. Done would be a documented explanation of the rationale for default transactions on model writes, based on the repository’s observed behavior.