[feat]: add serilog messaging of S9 events to send to slack or telegram (or perhaps matrix)

[dme1sc]

Prerequisites

• [x] I have searched for existing issues that already suggest this feature.

Describe the Feature Request

I assume this would break the tor/privacy of S9 so may be rejected (perhaps this messaging can be sent over clearnet when 040 is released?). But serilog messaging works well to send me status messages from btcpay server and posts to a slack channel so I can see various states such as payment requests, or server errors. I would like to see this for my Start9 for server events such as updates are available, the system is coming up after a shutdown, etc.... BTCPay documentation on this is at: https://github.com/Nisaba/btcpayserver-plugins#readme Maybe alternately, it can be sent to one of my localhosted matrix channels?

Describe the Use Case

Receiving proactive messaging can help with sysadmin management of the S9.

Describe Preferred Solution

install serilog messaging with various states (critical, error, verbose, etc...) of S9 server status

Describe Alternatives

No response

Anything else?