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/stop_production.sh

@@ -0,0 +1,69 @@
+#!/bin/bash
+
+# Production Stop Script for Trasabilitate Application
+# This script stops the Gunicorn WSGI server
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+print_success() {
+    echo -e "${GREEN}✅ $1${NC}"
+}
+
+print_warning() {
+    echo -e "${YELLOW}⚠️  $1${NC}"
+}
+
+print_error() {
+    echo -e "${RED}❌ $1${NC}"
+}
+
+echo -e "${BLUE}🛑 Trasabilitate Application - Production Stop${NC}"
+echo "=============================================="
+
+PID_FILE="../run/trasabilitate.pid"
+
+if [[ ! -f "$PID_FILE" ]]; then
+    print_warning "No PID file found. Server may not be running."
+    echo "PID file location: $PID_FILE"
+    exit 1
+fi
+
+PID=$(cat "$PID_FILE")
+
+if ps -p "$PID" > /dev/null 2>&1; then
+    echo "Stopping Trasabilitate application (PID: $PID)..."
+    
+    # Send SIGTERM first (graceful shutdown)
+    kill "$PID"
+    
+    # Wait for graceful shutdown
+    sleep 3
+    
+    # Check if still running
+    if ps -p "$PID" > /dev/null 2>&1; then
+        print_warning "Process still running, sending SIGKILL..."
+        kill -9 "$PID"
+        sleep 1
+    fi
+    
+    # Check if process is finally stopped
+    if ! ps -p "$PID" > /dev/null 2>&1; then
+        print_success "Application stopped successfully"
+        rm -f "$PID_FILE"
+    else
+        print_error "Failed to stop application (PID: $PID)"
+        exit 1
+    fi
+else
+    print_warning "Process $PID not found. Cleaning up PID file..."
+    rm -f "$PID_FILE"
+    print_success "PID file cleaned up"
+fi
+
+echo ""
+print_success "Trasabilitate application has been stopped"