fix(kvcache): decode lora_id/medium/lora_name/group_idx in BlockStored (#2285) #4863

Job	Run time
Build image (gateway-plugins)	2m 12s
Build image (controller-manager)	2m 47s
Build image (metadata-service)	1m 8s
Build image (runtime)	1m 6s
Build image (vllm-mock)	41s
installation-test	9m 20s
delete-artifacts	6s
	17m 20s

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