Feat: implement per operator settings cache

Fix: fix linter-found issues

Chore: move findOperatorId to own middleware file

Chore: delete old routes.js file and rename new-routes.js to routes.js

Fix: PR fixes

lib/middlewares/state.js

@@ -1,12 +1,13 @@
-module.exports = function () {
+module.exports = (function () {
   return {
-    oldVersionId: "unset",
+    oldVersionId: 'unset',
     settingsCache: {},
     canLogClockSkewMap: {},
     canGetLastSeenMap: {},
     pids: {},
     reboots: {},
     shutdowns: {},
-    restartServicesMap: {}
+    restartServicesMap: {},
+    mnemonic: null
   }
-}()
+}())