[FEATURE] Support replies chains for alerts. #179
Description
Аbstract
In current implementation each alert looks like a new alert. We can't understand is it new or not without reading and understanding it.
Motivation and Purposes
Alerts chains can help us to determine which alert is first in chain and when a problem has been appeared.
Specification
We have similar implementation with Resolved alerts type. I propose to scale this logic to any repeating alert.
Backwards Compatibility
To support backward compatibility we should send a regular alert message if we don't have an ID of previous alert in chain.