Update backup logic to use activity logs, not audit logs

app/Models/User.php

@@ -14,6 +14,7 @@ use Illuminate\Auth\Passwords\CanResetPassword;
 use Pterodactyl\Traits\Helpers\AvailableLanguages;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Foundation\Auth\Access\Authorizable;
+use Illuminate\Database\Eloquent\Relations\MorphToMany;
 use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
 use Illuminate\Contracts\Auth\Access\Authorizable as AuthorizableContract;
 use Illuminate\Contracts\Auth\CanResetPassword as CanResetPasswordContract;
@@ -273,6 +274,15 @@ class User extends Model implements
         return $this->hasMany(UserSSHKey::class);
     }
 
+    /**
+     * Returns all of the activity logs where this user is the subject — not to
+     * be confused by activity logs where this user is the _actor_.
+     */
+    public function activity(): MorphToMany
+    {
+        return $this->morphToMany(ActivityLog::class, 'subject', 'activity_log_subjects');
+    }
+
     /**
      * Returns all of the servers that a user can access by way of being the owner of the
      * server, or because they are assigned as a subuser for that server.