Deal with "Telegram Send Message Failed" due to User delete bot

[dinos80152]

https://stackoverflow.com/questions/35263618/how-can-i-detect-whether-a-user-deletes-the-telegram-bot-chat

{"error":"forbidden","level":"error","msg":"Telegram Send Message Failed","time":"2021-03-27T08:21:36Z"}

Design:

1. if get forbidden and then don't send a notification to this user
2. when get user add the bot again, switch on this user's notification