Auto-generate metric emitter mappings about druid HOT 2 OPEN

@ztzxt Do you want to take this up ?. We can always guide you. The logic would be a little brittle since we would have to parse out the metric from metrics.md file. Instead what we can do, as part of the release process, we can make a python script which parses out this logic from the metrics file and creates the relevant files. This can be done by the release manager one time before the release.

from druid.

Is metrics.md updated manually or is it generated from code? If it is generated from code, we can implement this in where the doc is generated. Otherwise, accepting the metrics.md as a source of truth makes sense. Also, could you point me to it if there is already a process for running scripts pre-release?

from druid.