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change the errors in the top contributions

Swarna rathna madhuri Kanda requested to merge feature/ui-date-range into feature/contributions-mapping-date-range

This MR fixes a KeyError: 'total_contributions' in the Contribution Mapping module.

The error occurred when executing df_results.nlargest(3, "total_contributions") because the total_contributions column was missing in the DataFrame at runtime, which caused the application to crash.

This fix ensures the column is properly created before use, verifies the column name (case-sensitive), and adds validation to prevent runtime failures while keeping existing contribution logic unchanged.

Screenshots ** Before ** After Application crashed with KeyError: 'total_contributions' Top Contributions loads successfully without errors How to set up and validate locally

Start the application.

Open Contribution Mapping.

Select a valid date range.

Verify that the Top Contributions section loads without errors.

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist .

Ensure no KeyError occurs and existing functionality remains stable.

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