I don't think you can get there, but CDG 2A has an AC Maple Leaf Lounge which is in Priority Pass. It's airside.

I've noticed some people hanging out in the CDG Sheraton lobby bar area and using WiFi. I'm not sure what the terms are, whether buying F&B would be enough or if you just purchase time with a credit card. They have the standard Sheraton lobby business center with printers. There's also a restaurant there.

You might want to consider getting a day room, although if you must leave it by 5 pm, it wouldn't be real helpful given your flight schedule.