Fix 1: Remove add_order_attachments and download_order_attachments from
the raw-permissions exclusion check in the test. These strings are valid
capability names that legitimately appear in the /limited-backoffice/roles
response, so including them in the 'should not contain' list caused a
false failure.
Fix 2: Update limitedBackofficeEmployeeListMode() in usersRoute.php to
exclude active limited backoffice employees when include_limited_backoffice_employees
is not set and the customer_number:0 filter is in use. Previously the
method returned additional_where:null in this case, so limited employees
were included in the result set alongside regular backoffice employees.