if it was me ..
I would just keep it in the 3 gallon, would only stress it to move it now, and 3G is nice for a CLF grow
but on your next grow make it your final pot, and use a cup fist and maybe even a 1 gallon in between and the 3 gallon a week before 12/12
I would get it more light for sure 3x6500K and 1x2700K for Veg. and a few more 2700K once in 12/12..
root`s should be out to the sideby now, with a little more light I would expect to see some good grow next few weeks..
in a weeks or so I would LST her (tie here down) use a string just over the soil to secure her to the side of the pot and bend her down in the opposite direction (I use two strings so the bend is`t to "sharp" one half way up and other one at the top, if your scared of it snapping you can do it a little at the time over a few days ..
after LSTing you will see all the side shoots growing up, competing for top spot, as the grow hormones have been redirected from the main shoot that is now tied down, like a tree that have falling down in a storm but survives, it will continue to grow but "side ways"
I normaly get between 6 and 12 main colas, not as big as with only one, maybe 1/3 the size but if I have 12 ... well you do the math !!
just harvest one the other day,56 grams top Buds, manicured and dried, and I guess about 20-30 grams of lower buds that will go in to oil makeing with the sugar leaves
voilator Kush 2 weeks as seedling 4 weeks Veg, 66 days flowering, LST`d under 296W T5HO in Veg and 600W HPS for flowering with 4 other plants