Replaced `PayByPhoneScript` with `GetLastDaysHistoryScript` in `main.cpp`. Introduced enhanced date/time utilities and improved database timestamp handling with `DateUtils`. Refactored `TransactionDAO` methods to separate parsing logic and added support for retrieving recent transactions within specified hours. Added the `GetLastDaysHistoryScript` class to parse and save recent transaction history.
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.