added graceful shutdown when scheduler config is not initialized #1198
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This PR fixes segmentation fault that may happen if the scheduler config is not initialized.
in GIE we allow configuring plugins either through config api or through code.
therefore when the config flags are missing, the program doesn't exit (to allow configuration by code to work).
we should add a nil check to validate we don't get segmentation fault when trying to initialize the scheduler.
this issue was originally hit in llm-d-scheduler, and reported here:
llm-d/llm-d-inference-scheduler#255