refactor: extract star/notification/badge helpers into database.py and add enrich_items content module

Introduce `update_target_stars`, `get_target_owner_uid`, and `VOTABLE_TARGETS`/`STAR_TARGETS` in database.py; replace inline badge insertion with `award_badge()` and inline notification creation with `create_notification()` across auth, comments, and follow routers; add `enrich_items()` in new content module to centralize post/gist list assembly and remove duplicated enrichment logic from feed and gists routers.

devplacepy/static/js/ServiceMonitor.js

@@ -1,3 +1,5 @@
+import { Http } from "./Http.js";
+
 class ServiceMonitor {
     constructor() {
         this.pollInterval = 5000;
@@ -29,8 +31,7 @@ class ServiceMonitor {
 
     async pollServices() {
         try {
-            const resp = await fetch("/admin/services/data");
-            const data = await resp.json();
+            const data = await Http.getJson("/admin/services/data");
             const container = document.getElementById("services-list");
             if (!container) return;
             for (const svc of data.services) {