This Pull Request adds the Upload Reports API. (Fix #211)
With this addition, external systems can automate and integrate the process of uploading reports.

Usage

The Upload Reports API allows you to upload a file specified in the file field as a report.
Authentication is performed using an API token, consistent with other APIs.

$ curl -X POST \
         -F [email protected] \
         -H "Authorization: Bearer {access_token}" \
         http://localhost:8000/api/upload/
{
  "message": "File saved for processing.",
  "job-id": 9,
  "doc-id": 9
}

Details

The behavior of the Upload Reports API is based on the existing Upload Reports functionality (/upload/).
The existing upload method has been refactored to be reusable and is now also invoked from the upload_api endpoint.

Additionally, error handling has been improved to return a clear error message when the required file field is missing in the request.