This is good to know that I was remembering a time limit wrong. (I swore I heard a timeline for it to complete from a halfling merchant in the grove. )
Anyway, it's good to know that I don't have to hamstring my characters so bad by not doing long rests. I was really worried that after a few days, (even if I avoided doing the things that are triggers) the ritual would complete anyway. So in EA, I was almost frantic to figure out how to rescue Halsin and take out the goblins despite having little to no rest and not being leveled up enough.