Returns a paginated list of benefit enrollment records for all members (employees and dependents) in the company for a given calendar year. Each record groups a member's plans and the date ranges during which they held each enrollment status. The caller must be a benefit admin; non-admin requests receive a 403. memberId is formatted as "employee.{id}" for employees and "dependent.{id}" for dependents. subscriberId is the employee ID as a string (the plan subscriber, even when the member is a dependent). Pagination defaults to page 1 with 25 items per page; pageSize must be between 1 and 99 inclusive.