Updated all SQL queries and bindings to replace camelCase field names (e.g., `updateTime`, `lastScan`) with snake_case equivalents (e.g., `update_time`). Ensures uniformity across database schema and codebase.
Added SQLite database support for managing device information and common data. Implemented DAOs for handling device and common data operations, such as inserting/updating devices and tracking the last scan time. Enhanced `DeviceScreener` to read device info, update database records, and take screenshots.