curl --request POST \
  --url https://pria.praxislxp.com/api/user/files \
  --header 'Content-Type: multipart/form-data' \
  --header 'x-access-token: <api-key>' \
  --form 'files=<string>' \
  --form confidential=false \
  --form 'fileConfidential={"report.pdf": true, "notes.txt": false}' \
  --form institution=6631915765bb0a94cfd6ca99 \
  --form account_shared=false \
  --form 'selectedCourse={"course_id": 1750532703472, "course_name": "Research"}' \
  --form selectedAssistant=6856fa89cbafcff8d98680f5 \
  --form files.items='@example-file'

{
  "success": true,
  "message": "Upload completed",
  "files": [
    {
      "fieldname": "files",
      "originalname": "<string>",
      "filename": "<string>",
      "mimetype": "<string>",
      "size": 123,
      "success": true,
      "message": "<string>",
      "usage": 123,
      "uploadId": "<string>",
      "file_url": "<string>",
      "file_title": "<string>",
      "file_summary": "<string>",
      "summary_model": "<string>",
      "image_analysis_model": "<string>",
      "embeddings_model": "<string>",
      "is_private": true,
      "status": "<string>",
      "thumbnail": "<string>"
    }
  ]
}