Add configurable Count summary options in pivot tables to distinguish between record count and field count

The Count summary function in pivot tables behaves differently based on whether "Show cell headers" is enabled. When off, it counts records. When on, it counts individual field values in those columns. Customers expect Count to consistently return the number of records, regardless of display settings.

Customers who need cell headers for readability and grouping cannot get accurate record counts. They must either remove additional fields (losing context) or create separate reports just for counts (reducing efficiency). This limits pivot tables from serving as comprehensive, all-in-one reporting tools.

Add configuration options for the Count summary function so customers can choose:

• Count of records (line items/rows)

• Count of field values (current behavior with cell headers)