Refactor network element state management
- Removed the NE state endpoint and related service logic from the network_data module.
- Introduced a new NEStateController to handle network element state records.
- Implemented NEState service and repository for managing state records in the database.
- Updated NEInfo and NeLicense controllers to utilize the new NEState service for fetching and saving state information.
- Enhanced state handling in the websocket processor to reflect the latest state of network elements.
- Added caching logic for network element states using Redis.
- Improved error handling and response formatting for state queries.
