Reglas de Formato Condicional XLSX

# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/xlsx-conditional-formatting-rule' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"workbookFile.ext","contentType":"application/octet-stream","size":12345}'

# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
  --data-binary @/path/to/file.ext

# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/es/api/tools/xlsx-conditional-formatting-rule' \
  -F 'workbookFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'rulesJson=[
  {
    "sheetName": "Tools API",
    "ref": "H2:H20",
    "type": "cellIs",
    "operator": "greaterThan",
    "formulae": [
      0
    ],
    "fillColor": "#DCFCE7",
    "fontColor": "#166534"
  }
]'