- Removed random initialization of unused fields (device_id, endpoint_id,...

- Removed random initialization of unused fields (device_id, endpoint_id, etc.) in the KPI descriptors during KPIs creation as this is no longer required.
- Fixed the logic of the ML confidence L3 cybersecurity KPI.
- Old inference results in the KPIs monitoring buffer is cleared periodically now.
- Added some useful debugging logs in the KPIs monitoring implementation.