Add basic auditing for filesystem actions

Specifically skipping read actions since there isn't much to say there, and it generally wouldn't be very helpful (plus, likely to generate lots of logs).

app/Http/Controllers/Api/Client/Servers/BackupController.php

@@ -4,6 +4,7 @@ namespace Pterodactyl\Http\Controllers\Api\Client\Servers;
 
 use Pterodactyl\Models\Backup;
 use Pterodactyl\Models\Server;
+use Pterodactyl\Models\AuditLog;
 use Illuminate\Http\JsonResponse;
 use Pterodactyl\Services\Backups\DeleteBackupService;
 use Pterodactyl\Repositories\Eloquent\BackupRepository;
@@ -61,6 +62,7 @@ class BackupController extends ClientApiController
     public function index(GetBackupsRequest $request, Server $server)
     {
         $limit = min($request->query('per_page') ?? 20, 50);
+
         return $this->fractal->collection($server->backups()->paginate($limit))
             ->transformWith($this->getTransformer(BackupTransformer::class))
             ->toArray();
@@ -77,11 +79,18 @@ class BackupController extends ClientApiController
      */
     public function store(StoreBackupRequest $request, Server $server)
     {
-        $backup = $this->initiateBackupService
-            ->setIgnoredFiles(
-                explode(PHP_EOL, $request->input('ignored') ?? '')
-            )
-            ->handle($server, $request->input('name'));
+        /** @var \Pterodactyl\Models\Backup $backup */
+        $backup = $server->audit(AuditLog::ACTION_SERVER_BACKUP_STARTED, function (AuditLog $model, Server $server) use ($request) {
+            $backup = $this->initiateBackupService
+                ->setIgnoredFiles(
+                    explode(PHP_EOL, $request->input('ignored') ?? '')
+                )
+                ->handle($server, $request->input('name'));
+
+            $model->metadata = ['backup_uuid' => $backup->uuid];
+
+            return $backup;
+        });
 
         return $this->fractal->item($backup)
             ->transformWith($this->getTransformer(BackupTransformer::class))
@@ -116,8 +125,10 @@ class BackupController extends ClientApiController
      */
     public function delete(DeleteBackupRequest $request, Server $server, Backup $backup)
     {
-        $this->deleteBackupService->handle($backup);
+        $server->audit(AuditLog::ACTION_SERVER_BACKUP_DELETED, function () use ($backup) {
+            $this->deleteBackupService->handle($backup);
+        });
 
-        return JsonResponse::create([], JsonResponse::HTTP_NO_CONTENT);
+        return new JsonResponse([], JsonResponse::HTTP_NO_CONTENT);
     }
 }