fix: unify log format, use placeholders instead of string concatenation (#24544)

api/core/llm_generator/llm_generator.py

             error = str(e)
             return {"error": f"Failed to generate code. Error: {error}"}
         except Exception as e:
-            logging.exception("Failed to invoke LLM model, model: " + json.dumps(model_config.get("name")), exc_info=e)
+            logging.exception("Failed to invoke LLM model, model: %s", model_config.get("name"), exc_info=e)
             return {"error": f"An unexpected error occurred: {str(e)}"}

api/core/rag/datasource/vdb/tidb_vector/tidb_vector.py

         self._dimension = 1536
 
     def create(self, texts: list[Document], embeddings: list[list[float]], **kwargs):
-        logger.info("create collection and add texts, collection_name: " + self._collection_name)
+        logger.info("create collection and add texts, collection_name: %s", self._collection_name)
         self._create_collection(len(embeddings[0]))
         self.add_texts(texts, embeddings)
         self._dimension = len(embeddings[0])
         pass
 
     def _create_collection(self, dimension: int):
-        logger.info("_create_collection, collection_name " + self._collection_name)
+        logger.info("_create_collection, collection_name %s", self._collection_name)
         lock_name = f"vector_indexing_lock_{self._collection_name}"
         with redis_client.lock(lock_name, timeout=20):
             collection_exist_cache_key = f"vector_indexing_{self._collection_name}"

api/core/rag/embedding/cached_embedding.py

                     db.session.rollback()
             except Exception as ex:
                 db.session.rollback()
-                logger.exception("Failed to embed documents: %s")
+                logger.exception("Failed to embed documents")
                 raise ex
 
         return text_embeddings