Add all-time stats tab with monthly breakdown on instance analytics.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/common/static/instance_stats.js

@@ -1,7 +1,7 @@
 (function (global) {
   "use strict";
 
-  var PERIODS = ["day", "week", "month"];
+  var PERIODS = ["day", "week", "month", "all"];
 
   function statsSegmentSelect() {
     return document.getElementById("stats-segment-select");