Historial de Prompts

{
  "success": true,
  "versions": [
    {
      "version_number": 4,
      "global_prompt": "You are Iris, a friendly sales rep for Acme...",
      "channel_prompts": { "whatsapp": "Keep replies under 2 sentences." },
      "changed_fields": ["global_prompt"],
      "changed_by_email": "founder@acme.com",
      "change_source": "api",
      "change_note": null,
      "activated_at": "2026-02-01T12:00:00Z",
      "superseded_at": null,
      "created_at": "2026-02-01T12:00:00Z"
    }
  ]
}

{
  "error": "Not found",
  "message": "Workflow not found"
}