Update LLM server, fix bugs, and format with `black` #41

Job	Run time
build-devices-plugin (3.8, ubuntu-latest)	3m 38s
build-devices-plugin (3.8, windows-latest)	8m 9s
build-devices-plugin (3.11, ubuntu-latest)	3m 47s
build-devices-plugin (3.11, windows-latest)	8m 16s
	23m 50s

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