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/wsgi.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+"""
+WSGI Entry Point for Trasabilitate Application
+This file serves as the entry point for WSGI servers like Gunicorn.
+"""
+
+import os
+import sys
+from app import create_app
+
+# Add the current directory to Python path
+sys.path.insert(0, os.path.dirname(__file__))
+
+# Create the Flask application instance
+application = create_app()
+
+# For debugging purposes (will be ignored in production)
+if __name__ == "__main__":
+    application.run(debug=False, host='0.0.0.0', port=8781)