Add Security Middleware & DevOps Infrastructure

[IlliaShyn]

🔒 Security & DevOps Features

Security Enhancements

• ✅ Security headers middleware (XSS, clickjacking protection)
• ✅ Request sanitization (SQL injection, XSS prevention)
• ✅ Audit logging system (all write operations tracked)
• ✅ Rate limiting integration (existing slowapi)

DevOps Infrastructure

• ✅ Comprehensive Makefile (20+ commands)
• ✅ Enhanced health checks
• ✅ Logging infrastructure (logs/ directory)
• ✅ Shell scripts for all platforms (Linux/Mac/Windows)

Documentation

• ✅ SECURITY.md (450+ lines of security architecture)
• ✅ DEPLOYMENT.md (600+ lines deployment guide)
• ✅ ILLIA_TASKS.md (task breakdown)
• ✅ Enhanced COMMANDS.md

Files Changed

• apps/api/app/middleware/ - New security middleware
• apps/api/app/main.py - Integrated middleware
• Makefile - DevOps commands
• *.ps1, *.sh - Platform scripts
• Documentation files

Testing

• Security headers present in responses
• Audit logging captures write operations
• Rate limiting functional
• All services start/stop correctly

Closes #