feat：日志上线数量可更改

src/chat/knowledge/qa_manager.py

@@ -7,9 +7,8 @@ from .kg_manager import KGManager
 
 # from .lpmmconfig import global_config
 from .utils.dyn_topk import dyn_select_top_k
-from src.llm_models.utils_model import LLMRequest
 from src.chat.utils.utils import get_embedding
-from src.config.config import global_config, model_config
+from src.config.config import global_config
 
 MAX_KNOWLEDGE_LENGTH = 10000  # 最大知识长度