Refactor Server model to remove SSH multiplexing file and add ServerCleanupMux job

- Remove SSH multiplexing file from the Server model
- Add ServerCleanupMux job to cleanup multiplexed connections every hour

app/Jobs/ServerCleanupMux.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Helpers\SshMultiplexingHelper;
+use App\Models\Server;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldBeEncrypted;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+
+class ServerCleanupMux implements ShouldBeEncrypted, ShouldQueue
+{
+    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
+
+    public $tries = 1;
+
+    public $timeout = 60;
+
+    public function backoff(): int
+    {
+        return isDev() ? 1 : 3;
+    }
+
+    public function __construct(public Server $server) {}
+
+    public function handle()
+    {
+        try {
+            if ($this->server->serverStatus() === false) {
+                return 'Server is not reachable or not ready.';
+            }
+            SshMultiplexingHelper::removeMuxFile($this->server);
+
+        } catch (\Throwable $e) {
+            return handleError($e);
+        }
+
+    }
+}