Optimize API

Оптимизация изображений через gateway с учетом лимитов.

POST /v1/optimize (multipart/form-data)
images: file[]
width|max_width: int (optional)
format: original|jpeg|png|webp

{
  "success": true,
  "results": [{
    "filename": "photo.jpg",
    "optimized_size": 312044,
    "saved_percent": 63.0,
    "optimized_base64": "..."
  }]
}