v0.3.8

Dev first block cache (#12)

* implement first block cache

* fix

* fix

* fix

* add doc

* fix

* make flux work

* fix

* fix

* fix

* fix

* refactor

* fix

* fix

* Update fastest_hunyuan_video.md

* Update fastest_hunyuan_video.md

* fix

* fix

* fix

* fix