* Fix/employees page salary display logic and labels
* feat: add salary_worked_days table and related functionality
- Implemented the salary_worked_days table to track per-day worked hours for hourly employees.
- Established row-level security (RLS) policies to ensure tenant isolation for salary_worked_days.
- Created unique index on (employee_id, work_date) to enforce uniqueness.
- Added trigger to enforce a 24-hour cap across worked and absence days for the same employee and date.
- Developed tests to validate RLS, uniqueness, and 24-hour cap logic.
* Fix: update hourly_salary calculation and refresh logic in salary run processing