Add Security Enhancements

[sunnya97]

Summary

Implement comprehensive security features including authentication, authorization, process isolation, and audit logging.

Current Status

• No authentication currently implemented
• No access control mechanisms
• Security considerations not addressed

Acceptance Criteria

• API key authentication
• JWT token support
• Role-based access control (view/control/admin)
• Process isolation (user/group IDs)
• Resource limit enforcement (cgroups on Linux)
• Audit logging for all operations
• TLS support for API and WebSocket
• Secure configuration storage

Technical Implementation Notes

• Files affected: src/api/, new auth module
• Consider integration with existing authentication systems
• Platform-specific isolation mechanisms
• Compliance considerations

Priority: Low
Complexity: Medium
Component: API, Security