curl --request GET \
  --url http://localhost:3000/v1/availability

{
  "products": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "brand": "<string>",
      "image_url": "<string>",
      "selling_price": 123,
      "is_rfc_item": true,
      "availability_score": 123,
      "availability_tier": "<string>",
      "availability_score_updated_at": "<string>",
      "confidence": {
        "level": "<string>",
        "lower": 123,
        "upper": 123
      },
      "demand_velocity_7d": 123,
      "demand_velocity_updated_at": "<string>",
      "target_stock_days": 123,
      "reorder_point_days": 123,
      "max_restock_per_sweep": 123,
      "preferred_retailer": "<string>",
      "scraped_product_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "category": {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "name": "<string>"
      }
    }
  ],
  "count": 123,
  "offset": 123,
  "limit": 123,
  "stats": {
    "total": 123,
    "by_tier": {
      "high": 123,
      "medium": 123,
      "low": 123,
      "unavailable": 123,
      "unknown": 123
    },
    "by_confidence": {
      "high": 123,
      "medium": 123,
      "low": 123
    }
  }
}