Refactor log utils (#10973)

### What problem does this PR solve?

As title.

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

rag/llm/embedding_model.py

@@ -27,7 +27,7 @@ from ollama import Client
 from openai import OpenAI
 from zhipuai import ZhipuAI
 
-from api.utils.log_utils import log_exception
+from common.log_utils import log_exception
 from common.token_utils import num_tokens_from_string, truncate
 from api import settings
 import logging