fix sequence2txt error and usage total token issue (#2961)

### What problem does this PR solve?

#1363

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/conversation_app.py

@@ -26,7 +26,6 @@ from api.db.services.dialog_service import DialogService, ConversationService, c
 from api.db.services.knowledgebase_service import KnowledgebaseService
 from api.db.services.llm_service import LLMBundle, TenantService, TenantLLMService
 from api.settings import RetCode, retrievaler
-from api.utils import get_uuid
 from api.utils.api_utils import get_json_result
 from api.utils.api_utils import server_error_response, get_data_error_result, validate_request
 from graphrag.mind_map_extractor import MindMapExtractor
@@ -187,6 +186,7 @@ def completion():
                     yield "data:" + json.dumps({"retcode": 0, "retmsg": "", "data": ans}, ensure_ascii=False) + "\n\n"
                 ConversationService.update_by_id(conv.id, conv.to_dict())
             except Exception as e:
+                traceback.print_exc()
                 yield "data:" + json.dumps({"retcode": 500, "retmsg": str(e),
                                             "data": {"answer": "**ERROR**: " + str(e), "reference": []}},
                                            ensure_ascii=False) + "\n\n"

api/db/services/llm_service.py

@@ -133,7 +133,8 @@ class TenantLLMService(CommonService):
             if model_config["llm_factory"] not in Seq2txtModel:
                 return
             return Seq2txtModel[model_config["llm_factory"]](
-                model_config["api_key"], model_config["llm_name"], lang,
+                key=model_config["api_key"], model_name=model_config["llm_name"],
+                lang=lang,
                 base_url=model_config["api_base"]
             )
         if llm_type == LLMType.TTS:

api/utils/file_utils.py

@@ -197,6 +197,7 @@ def thumbnail_img(filename, blob):
             pass
     return None
 
+
 def thumbnail(filename, blob):
     img = thumbnail_img(filename, blob)
     if img is not None:
@@ -205,6 +206,7 @@ def thumbnail(filename, blob):
     else:
         return ''
 
+
 def traversal_files(base):
     for root, ds, fs in os.walk(base):
         for f in fs: