9ad32e40e6
- Add MAX_UPLOAD_SIZE config (default 1GB) to prevent resource exhaustion - Add MAX_SINGLE_FILE_SIZE config for optional PDF file splitting - Implement automatic PDF splitting when files exceed single file limit - Update upload endpoint to use configured limits instead of hardcoded 500MB - Add comprehensive tests for upload limits and file splitting - Document configuration in ConfigurationGuide.md and SECURITY_AUDIT.md - Reference SECURITY_AUDIT.md in error messages for user guidance Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>