feat: log the last time a valid api token was seen, have v3 ping route go through setupApiRoute helper

src/api/utils.js

@@ -0,0 +1,11 @@
+'use strict';
+
+const db = require('../database');
+
+const utils = module.exports;
+
+// internal token management utilities only
+
+utils.log = async (token) => {
+	await db.sortedSetAdd('tokens:lastSeen', Date.now(), token);
+};