Spell Lock tracking is broken for aff lock only (it happens after you sac the pet).

It might be needed when the warlock uses the instant summon to bring out another felhunter (and gains another spell lock immediately).

Solution:

1. Track by unitId
2. Associate with owner

BTW sac spell lock and regular spell lock are on separate cooldowns

1. Summon pet, use spell lock, it works
2. Sac pet, use spell lock, it doesn't work
3. Summon pet again, use spell lock, it doesn't work

Need confirmation: does Fel Domination reset the cooldown of spell lock?
https://www.wowhead.com/spell=333889/fel-domination#comments

https://us.forums.blizzard.com/en/wow/t/pet-resummoncommand-demon-no-longer-functional/732320

Can possible use UNIT_SPELLCAST_SUCCEEDED for all pet abilities?

Sac spell lock and regular one is tracked separately with latest change #25