Fix
* fix: Ensure activation scaling factor set before initializing b_dec when needed (440)
Co-authored-by: Keltin Grimes <kgrimessei.cmu.edu> ([`1145a62`](https://github.com/jbloomAus/SAELens/commit/1145a62ae94ceac4b0ff3f60485aa311b1f08991))
* fix: base k_aux on d_in instead of d_sae in topk aux loss (432)
* fix: base k_aux on d_in instead of d_sae in topk aux loss
* detaching error before aux loss and fixing tests
* changes from cr
* fixing tests ([`5325c06`](https://github.com/jbloomAus/SAELens/commit/5325c06309c543078e35f63e4e9fb5402811aec7))