lora-syncer tool's error handling needs improvement

[kfswain]

What happened: lora was unable to be loaded to vLLM, and the lora syncer emitted Red Herring error logs and kept retrying the same adapter, blocking other, valid adapters

What you expected to happen: fail to load an adapter gracefully, and move on to the next one in the list

How to reproduce it (as minimally and precisely as possible): configure 2 lora adapters, 1 valid rank 8 adapter, and one invalid adapter (vllm default max rank is 16, so choose larger than that), apply.