CSV Export Parity with JSON

The CSV expense data export needs enhancement to align with the JSON export, ensuring data completeness and consistent ordering for better usability.

1. Missing Data Column: Paid By

The CSV output currently lacks the necessary field to identify the user who paid the expense using a readable name.

• Current Status: No 'Paid By' column exists.
• Request: Add a column, such as 'Paid By', which displays the descriptive name of the paying participant. (Matching the approach of other readable fields in the CSV.)

2. Missing Sorting Logic

The CSV output is not sorted, which makes data comparison and analysis inefficient.

• Current Status: Data is exported in an arbitrary and unpredictable order.
• Request: Implement consistent sorting logic to match the UI and JSON export:
  • Primary Sort: expenseDate (Ascending)
  • Secondary Sort: createdAt (Ascending)