add mr and issue clomn in team summury table

This MR enhances the Team Summary section in Contribution Mapping by adding two new metrics: Merge Requests count and Issues count per user.

The system now fetches and displays the total number of Merge Requests and Issues created by each user within the selected date range. The data updates dynamically when the date range changes and shows 0 when no records exist.

This improvement provides a more complete and accurate overview of individual contributions while maintaining performance and UI consistency.