VSN-797/Implement Excel export of infrastructure data and FTP upload/download

Main task:

• Implement infrastructure data export using existing FTP service from starter
• Optimize SectorRepository query for efficient data export
• Add FTP service integration for file upload and download
• Optimize batch processing for infrastructure data

Additional improvements:

• Enhance service implementations for better data handling
• Update DTOs structure for improved data organization
• Refactor controllers for better data flow