CBC Employee Cleanupv3

Refactor export functionality and enhance organizational data handling

- Updated Excel export sheet names for clarity, changing 'Cleaned Data' to 'Masterdata' and 'Current Users' to 'Active Users'.
- Improved matching logic in ProcessingController to prioritize exact matches for 'Department/Branch' and 'Group Name'.
- Enhanced name column detection in MatchingEngine to better identify full name columns with flexible matching strategies.
- Updated ResultsView to reflect changes in dataset naming for improved user understanding.