A week is probably
enough to de-chlorinate it.
Dead worms = food for other things.
Personally, it doesn't seem to be a problem of whether dead worms are good for soil (which they are). Your problems seem to be
1) Is chlorination gone?
2) is killing worms okay?
As for (1) I think after a week chlorine is not a problem, as it evaporates on its own.
As for (2) I would prefer to see worms alive and doing stuff rather than dead and just providing food for bacteria.
Another problem might be the fact that your compost tea went anarobic. I did the same thing and killed my "compostonauts". They probably didn't have enough oxygen or they got killed by the fresh chlorine. Btw, why are you using chlorinated water for compost tea? That seems weird, as you are adding something that is designed to kill bacteria, which you want.
Maybe you should use rain water (or water left out for a day), screen just to pull out red worms to put them in the garden, then screen again for compost tea. Just a thought.
William