Enhance resource management in Proxmox: implement caching for available resources in Node model; add cache invalidation on server updates and deletions

extensions/Servers/Proxmox/Proxmox.php

@@ -1040,6 +1040,7 @@ class Proxmox extends ClassServer
         $server->hostname = $properties['hostname'];
         $server->password = $password;
         $server->save();
+        $node->forgetResourceCache();
 
         // Update the IPs
         foreach ($ipv4->ips as $ip) {
@@ -1162,7 +1163,9 @@ class Proxmox extends ClassServer
         // Release IP addresses so they can be reallocated
         $server->ipAddresses()->update(['server_id' => null]);
         // Delete server
+        $node = $server->node;
         $server->delete();
+        $node->forgetResourceCache();
 
         return true;
     }
@@ -1193,6 +1196,7 @@ class Proxmox extends ClassServer
         } else {
             $this->syncServerSettings($server, $settings, null);
         }
+        $server->node->forgetResourceCache();
 
         return true;
     }