pdm failure on CI lock update

[merry glacier]

Oh, wait, in creating a fresh PR for the CI lock update (https://github.com/lmstudio-ai/venvstacks/pull/317/), I noticed that hishel was updated. Given the reported traceback ended with a failure to find a hishel private module, and the locked hishel version went from 0.1.3 to 1.1.2, that seems like the more plausible culprit

Yep, 1.0.0.dev0 landed a big rearrangement of the hishel source tree, so that module is gone: https://github.com/karpetrosyan/hishel/commit/d1f8abfe49c5a3b6ad2950baaa50c6d8d50be3b8

Issue report incoming