viewer.enrolledDevices shared DeviceConnection with the admin
org list, so totalCount had to authorize with both
employee-device:list and device:list. Mirror
EmployeeDocumentConnection: a dedicated EmployeeDeviceConnection
without totalCount, and keep DeviceConnection.totalCount for
the org fleet only. Cover assumed-session device:get IDOR in e2e.
Signed-off-by: Ludovic Vielle <ludovic@probo.com>