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/Http/Controllers/LiveTrafficController.php

@@ -364,8 +364,8 @@ class LiveTrafficController extends Controller
                 'scale' => self::RATE_SCALE,
                 'updatedAt' => now()->toIso8601String(),
                 'timestamp' => now()->timestamp,
-                'error' => $e->getMessage(),
-            ]);
+                'error' => 'An internal error occurred.',
+            ], 500);
         }
     }
 }