Update LLM server, fix bugs, and format with `black` #35

Job	Run time
build-devices-plugin (3.8, ubuntu-latest)	3m 0s
build-devices-plugin (3.8, windows-latest)	2m 52s
build-devices-plugin (3.11, ubuntu-latest)	2m 43s
build-devices-plugin (3.11, windows-latest)	2m 53s
	11m 28s

Provide feedback