feat: Major system improvements and production deployment

✨ New Features:
- Added view_orders route with proper table display
- Implemented CSV upload with preview workflow and date parsing
- Added production WSGI server configuration with Gunicorn
- Created comprehensive production management scripts

🔧 Bug Fixes:
- Fixed upload_data route column mapping for actual CSV structure
- Resolved print module database queries and template rendering
- Fixed view orders navigation routing (was pointing to JSON API)
- Corrected barcode display width constraints in print module
- Added proper date format parsing for MySQL compatibility

🎨 UI/UX Improvements:
- Updated view_orders template with theme-compliant styling
- Hidden barcode text in print module preview for cleaner display
- Enhanced CSV upload with two-step preview-then-save workflow
- Improved error handling and debugging throughout upload process

🚀 Production Infrastructure:
- Added Gunicorn WSGI server with proper configuration
- Created systemd service for production deployment
- Implemented production management scripts (start/stop/status)
- Added comprehensive logging setup
- Updated requirements.txt with production dependencies

📊 Database & Data:
- Enhanced order_for_labels table compatibility
- Fixed column mappings for real CSV data structure
- Added proper date parsing and validation
- Improved error handling with detailed debugging

🔧 Technical Debt:
- Reorganized database setup documentation
- Added proper error handling throughout upload workflow
- Enhanced debugging capabilities for troubleshooting
- Improved code organization and documentation

py_app/trasabilitate.service

@@ -0,0 +1,27 @@
+[Unit]
+Description=Trasabilitate Quality Management Application
+After=network.target mariadb.service
+Wants=mariadb.service
+
+[Service]
+Type=forking
+User=ske087
+Group=ske087
+WorkingDirectory=/srv/quality_recticel/py_app
+Environment="PATH=/srv/quality_recticel/recticel/bin"
+ExecStart=/srv/quality_recticel/recticel/bin/gunicorn --config gunicorn.conf.py --pid /srv/quality_recticel/run/trasabilitate.pid --daemon wsgi:application
+ExecReload=/bin/kill -s HUP $MAINPID
+ExecStop=/bin/kill -s TERM $MAINPID
+PIDFile=/srv/quality_recticel/run/trasabilitate.pid
+Restart=always
+RestartSec=10
+
+# Security settings
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ReadWritePaths=/srv/quality_recticel
+ProtectHome=true
+
+[Install]
+WantedBy=multi-user.target