feat: Update Proxmox extension with various improvements and bug fixes

- Change listStates method to accept nullable integer for limit parameter.
- Modify TechnitiumDns class to return structured error messages on failure.
- Enhance VNC and xterm popup routes with user authorization checks.
- Update backups view to improve loading states and add unique keys for dynamic elements.
- Refactor cloud-init view to ensure proper data binding and improve user experience.
- Add wire:key attributes to various elements in views for better Livewire performance.
- Improve error handling and user feedback in the firewall view.
- Update server overview and statistics views to handle potential null values gracefully.
- Add new migration files to extend database schema with user-set icons and notes for Proxmox nodes.

extensions/Servers/Proxmox/Models/Node.php

@@ -11,6 +11,7 @@ class Node extends Model
     protected $fillable = [
         // Shows to customer
         'name',
+        'notes',
         'memory',
         'disk',
         'cpu',
@@ -51,9 +52,9 @@ class Node extends Model
         $usedDisk = 0;
         $usedCpu = 0;
         foreach ($servers as $server) {
-            $usedMemory += (int) $server->service->product->settings()->where('key', 'memory')->first()->value ?? 0;
-            $usedDisk += (int) $server->service->product->settings()->where('key', 'disk')->first()->value ?? 0;
-            $usedCpu += (int) $server->service->product->settings()->where('key', 'cpu')->first()->value ?? 0;
+            $usedMemory += (int) ($server->service->product->settings()->where('key', 'memory')->first()?->value ?? 0);
+            $usedDisk += (int) ($server->service->product->settings()->where('key', 'disk')->first()?->value ?? 0);
+            $usedCpu += (int) ($server->service->product->settings()->where('key', 'cpu')->first()?->value ?? 0);
         }
 
         return [