- Write content to /home/cyberpanel/scanner_temp_{scan_id}_{timestamp}.tmp first
- Use Python open() instead of shell here-document to avoid:
- lscpd connection reset for large files (>2KB)
- EOF_MARKER conflicts in file content
- Shell command size limits
- Copy temp file to user directory using executioner with user context
- Clean up CyberPanel temp file after copy
- Fixes: [Errno 104] Connection reset by peer when writing large files