Just took an SG reading and it's holding steady somewhere between 1.006 and 1.007.
The muslin bag with the hop pellets in has swollen up but seems to be doing its job as there's now a pronounced hoppy aroma and taste. Tasted pretty bloody good to be fair.
I'm going to leave it until Saturday to rack to the secondary FV. If I were to cold crash, do I do that before batch adding the priming sugar, or after? What's a good timescale for cold crashing? Seems to be anything from one day to a week!
I wouldn't transfer to secondary. TBH it's rarely done these days.
Every time you open or transfer your beer you're introducing oxygen, which causes oxidation, a killer of good beer! The less the better.
I don't think a cold crash is necessary for you. A cold crash could be beneficial if
1. you're dry hopping loose - as it will help the loose hops to sink before bottling. Or
2. You want a bright beer.
Your hops are bagged, and a hoppy APA style is fine or even preferred with hazy clarity, so neither of those are important to you.
So, when the gravity is stable, I would transfer to bottling bucket and bottle.
Your question about cold crashing time... You'd crash the fermenter before batch priming.
Cold crash duration a day to a week perhaps. A few days probably average. If you've got dry hops in the beer then that will influence your crash time - as you probably don't want them in for too long.
You want to prime only immediately before bottling, as the priming sugar is intended to be used to generate the carbonation - which can only happen once the beer is packaged into sealed container(s). If you added sugar sooner, then it would just ferment a bit more and gas-off the CO2 out the airlock.
Carbonation occurs when the CO2 has nowhere else to go (due to pressure), so it dissolves into the beer.
I'm discounting the fact that cold crashing would hugely inhibit the fermentation rate!
Hope it helps, and not too much information.