fix(service-worker): prevent multiple unregister attempts in session

- Updated the unregister script to check if an attempt to unregister service workers has already been made in the current session, preventing unnecessary reloads and improving user experience.
- If service workers are registered, the script will perform a hard reload; otherwise, it will unregister any pending registrations.

worklenz-frontend/public/unregister-sw.js

@@ -1,6 +1,10 @@
 if ('serviceWorker' in navigator) {
+  // Check if we've already attempted to unregister in this session
+  if (!sessionStorage.getItem('swUnregisterAttempted')) {
     navigator.serviceWorker.getRegistrations().then(function(registrations) {
       if (registrations.length > 0) {
+        // Mark that we've attempted to unregister
+        sessionStorage.setItem('swUnregisterAttempted', 'true');
         // If there are registered service workers, do a hard reload first
         window.location.reload(true);
       } else {
@@ -10,4 +14,5 @@ if ('serviceWorker' in navigator) {
         }
       }
     });
+  }
 }