Upload a document for structured extraction.

Uploads a PDF document that can be used for structured data extraction. Only PDF files are supported.

Supported File Types:

1. PDF files only (.pdf extension)
2. Maximum file size: 50MB (recommended)
3. Documents are processed and validated upon upload

Document Processing:

1. File size and page count are automatically calculated
2. Document is validated for PDF format and readability
3. Metadata is extracted and stored for future reference
4. Document is stored securely and can be referenced by ID

Usage:

After uploading, you'll receive a document_id that can be used with:

1. POST /jobs endpoint to start extraction jobs
2. GET /documents/{document_id} to retrieve document information
3. DELETE /documents/{document_id} to remove the document

Example Response:

{
  "document_id": "123e4567-e89b-12d3-a456-426614174000",
  "file_name": "financial_report.pdf",
  "file_size": 2048576,
  "page_count": 45,
  "uploaded_at": "2025-01-11T18:35:00Z",
  "status": "uploaded"
}