VibeNVR v1.28.x: Universal AI Switch, MQTT, and Multi-Model TFLite Support

VibeNVR v1.28.0 and v1.28.1 introduce a major architectural shift in how the AI engine is managed. v1.28.0 - The AI & Connectivity Update This release lays the foundation for a proper multi-model AI pipeline: Multi-model TFLite support : choose between YOLOv8 and MobileNet SSD v2, optimizing for precision or speed Global AI Engine : model and hardware selection moved to System Settings for centralized management NMS (Non-Maximum Suppression) : eliminates redundant bounding boxes, with config