curl --request POST \
  --url https://controller.platform.simplecloud.app/v0/server-groups/workflows/manual \
  --header 'Content-Type: application/json' \
  --header 'X-Network-ID: <x-network-id>' \
  --header 'X-Network-Secret: <x-network-secret>' \
  --data '{}'

{
  "failed_servers": [
    {
      "error_message": "workflow execution was rejected by serverhost",
      "server_id": "123e4567-e89b-12d3-a456-426614174000"
    }
  ],
  "message": "Manual workflow execution completed",
  "server_group_id": "123e4567-e89b-12d3-a456-426614174000",
  "skipped_server_ids": [
    "<string>"
  ],
  "succeeded_server_ids": [
    "<string>"
  ],
  "total_servers": 3,
  "workflow_id": "internal.cleanup"
}