[dreamwidth/dw-free] b5c6eb: Add metrics emitter

[github]

Branch: refs/heads/master
Home: https://github.com/dreamwidth/dw-free
Commit: b5c6eb157b654f3f4a23cf3ae5d9c2a34ac71471
https://github.com/dreamwidth/dw-free/commit/b5c6eb157b654f3f4a23cf3ae5d9c2a34ac71471
Author: Mark Smith <mark@dreamwidth.org>
Date: 2019-12-08 (Sun, 08 Dec 2019)

Changed paths:
A bin/worker/metrics-emitter
M cgi-bin/DW/Stats.pm
M cgi-bin/DW/TaskQueue.pm

Log Message:
-----------
Add metrics emitter

This gets metrics from AWS and emits them into Datadog so that we can do
autoscaling and the like.

Not that autoscaling seems like a good idea, actually. F.