3 month old rolling onto side

My sweet girl will be 3 months in a few days is showing all kinds of wonderful development and I’m super excited! She’s still in her bassinet and sleeping in the room with us. She’s has had a pretty consistent night sleep schedule for about a month and a half now- sleeps 6-8 hours uninterrupted in her swaddle in bassinet at night, wakes up for her bottle and then falls back asleep on my chest or in bassinet for an additional 1-3 hours. It’s been so nice.

The last few days she’s been squirming around a lot when I put her down and when she’s fast asleep. I’ve found her rolled on her side and on one side of the bassinet the last two days in a row.

Is this like THE sign to stop the swaddle soon and possibly transition to a crib? My bassinet is amazing and holds up to a 20lb baby, and my girl is 12lbs right now. I’m not chomping at the bit to move her yet, but would definitely like to know some thoughts on this. Is it time for a sleep sack? A weighted swaddle?? Thank you.