[misc] bump metrics module to 3.4.1

- renamed package from `metrics-sharelatex` to `@overleaf/metrics`
- drop support for statsd backend
- decaffeinate
- compress `/metrics` response using gzip
- bump debugging agents to latest versions
- expose prometheus interfaces for custom metrics (custom tags)
- cleanup of open sockets metrics
- fix deprecation warnings for header access

services/contacts/app.js

@@ -4,7 +4,7 @@
  * DS207: Consider shorter variations of null checks
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
-const Metrics = require('metrics-sharelatex')
+const Metrics = require('@overleaf/metrics')
 Metrics.initialize('contacts')
 
 const Settings = require('settings-sharelatex')

services/contacts/app/js/ContactManager.js

@@ -13,7 +13,7 @@
 let ContactManager
 const { db, ObjectId } = require('./mongodb')
 const logger = require('logger-sharelatex')
-const metrics = require('metrics-sharelatex')
+const metrics = require('@overleaf/metrics')
 
 module.exports = ContactManager = {
   touchContact(user_id, contact_id, callback) {

services/contacts/package.json

@@ -19,11 +19,11 @@
     "format:fix": "node_modules/.bin/prettier-eslint $PWD'/**/*.js' --write"
   },
   "dependencies": {
+    "@overleaf/metrics": "^3.4.1",
     "async": "^2.6.3",
     "body-parser": "^1.19.0",
     "express": "^4.17.1",
     "logger-sharelatex": "^2.2.0",
-    "metrics-sharelatex": "^2.6.2",
     "mongodb": "^3.6.0",
     "request": "~2.88.2",
     "settings-sharelatex": "^1.1.0",

services/contacts/test/unit/js/ContactsManagerTests.js

@@ -28,7 +28,7 @@ describe('ContactManager', function () {
           ObjectId
         },
         'logger-sharelatex': { log: sinon.stub() },
-        'metrics-sharelatex': { timeAsyncMethod: sinon.stub() }
+        '@overleaf/metrics': { timeAsyncMethod: sinon.stub() }
       }
     })
     this.user_id = ObjectId().toString()