Finish an upload and attach the file to the expiry

curl -X POST 'https://api.expiryedge.com/v1/completeExpiryAttachmentUpload' \
  -H "Authorization: Bearer $EXPIRYEDGE_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "upload_id": "pUp7x1"
}'

{
  "attachment": {
    "index": 1,
    "name": "Gas Safety Certificate 2026.pdf",
    "url": "https://firebasestorage.googleapis.com/v0/b/stylingsphere.appspot.com/o/user_files%2Forg_northwind%2Fu_71bXq%2Fexpiry_exp_4Tq9sLm2%2F1790517900000_Gas_Safety_Certificate_2026.pdf?alt=media&token=9c2e4d1a-7b3f-4e6a-8d5c-1f0a2b3c4d5e"
  },
  "attachments": [
    {
      "index": 0,
      "name": "Gas Safety Certificate 2025.pdf",
      "url": "https://firebasestorage.googleapis.com/v0/b/stylingsphere.appspot.com/o/user_files%2Forg_northwind%2Fu_71bXq%2Fexpiry_exp_4Tq9sLm2%2FGas_Safety_Certificate_2025.pdf?alt=media&token=5b1f0c7e-2a41-4d8e-9f3a-0c6d2e7b9a11"
    },
    {
      "index": 1,
      "name": "Gas Safety Certificate 2026.pdf",
      "url": "https://firebasestorage.googleapis.com/v0/b/stylingsphere.appspot.com/o/user_files%2Forg_northwind%2Fu_71bXq%2Fexpiry_exp_4Tq9sLm2%2F1790517900000_Gas_Safety_Certificate_2026.pdf?alt=media&token=9c2e4d1a-7b3f-4e6a-8d5c-1f0a2b3c4d5e"
    }
  ]
}