고객 추이 버그 수정

src/main/java/com/goi/erp/repository/CustomerRepository.java

@@ -40,7 +40,6 @@ public interface CustomerRepository extends JpaRepository<Customer, Long> {
             SELECT CAST(series.day AS date) AS day,
                    (SELECT COUNT(*) FROM crm.customer c
                      WHERE c.cus_status = 'A'
-                       AND c.cus_contract_date IS NOT NULL
                        AND c.cus_contract_date <= CAST(series.day AS date)
                        AND (c.cus_terminated_date IS NULL OR c.cus_terminated_date > CAST(series.day AS date))
                    ) AS active_count,