Return sync

curl --location --request POST 'http://localhost:8000/api/v1/return/sync' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
  "supplier_id": [1, 1],
  "batch_code": ["BCH-240204-9234", "BCH-240204-9238"],
  "date": ["2025-10-28", "2025-10-28"],
  "items": [
    {
      "product_id": [1, 2],
      "quantity": [5, 2],
      "reason": ["DAMAGED", "OTHER"],
      "other_reason": [null, "Kemasan bocor"]
    },
    {
      "product_id": [1],
      "quantity": [3],
      "reason": ["EXPIRED"],
      "other_reason": [null]
    }
  ]
}'