when "test quota on write" fails, it should notify pod owner

In catching up on a lot of discussion and updates, it seems that when the "test quota on write" fails it results in a notification to the attempting writer -- so if @kjetilk tries to write to @RubenVerborgh's INBOX and that write would exhaust quota, @kjetilk gets notified -- but @RubenVerborgh does not.

This is troublesome, as @kjetilk's best (and possibly only) way to inform @RubenVerborgh of this problem is via his inbox ... which is full. I think that this is a place where NSS might use @RubenVerborgh's email address to send such a notification without consuming further NSS-quota.

Originally posted in https://github.com/solid/node-solid-server/issues/918#issuecomment-450062727

先找到 "test quota on write" 失敗的 Node.js 實作與通知路徑，然後閱讀所連結的 issue 918 討論以了解背景。當 pod 擁有者在不消耗額外 quota 的情況下收到 quota 失敗通知，同時現有的 writer 通知行為仍獲得理解並受到涵蓋時，工作即告完成。