- Added db_history.py to manage DevicesHistory table and triggers for INSERT and UPDATE operations.
- Created device_history_instance.py for querying and grouping DevicesHistory records.
- Developed change_history.php for displaying device change history with filtering and pagination.
- Introduced skel_device_details_tab_history.php for skeleton loading state in device details tab.
- Added unit tests in test_device_history.py to validate trigger functionality and history management.
- Implemented filter population and pagination in the change history UI.
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