修复使用chatgpt等在线API服务时模型加载错误 (#1271)

* close #1172: 给webui_page/utils添加一些log信息，方便定位错误

* 修复：重建知识库时页面未实时显示进度

* skip model_worker running when using online model api such as chatgpt

---------

Co-authored-by: liunux4odoo <liunu@qq.com>

configs/model_config.py.example

@@ -70,7 +70,6 @@ llm_model_dict = {
     # 4.0 seconds as it raised APIConnectionError: Error communicating with OpenAI.
     # 需要添加代理访问(正常开的代理软件可能会拦截不上)需要设置配置openai_proxy 或者 使用环境遍历OPENAI_PROXY 进行设置
     "gpt-3.5-turbo": {
-        "local_model_path": "gpt-3.5-turbo",
         "api_base_url": "https://api.openai.com/v1",
         "api_key": os.environ.get("OPENAI_API_KEY"),
         "openai_proxy": os.environ.get("OPENAI_PROXY")

startup.py

@@ -404,14 +404,16 @@ def dump_server_info(after_start=False):
         processes["openai_api"] = process
 
     if args.model_worker:
-        process = Process(
-            target=run_model_worker,
-            name=f"model_worker({os.getpid()})",
-            args=(args.model_name, args.controller_address, queue, len(processes) + 1),
-            daemon=True,
-        )
-        process.start()
-        processes["model_worker"] = process
+        model_path = llm_model_dict[args.model_name].get("local_model_path", "")
+        if os.path.isdir(model_path):
+            process = Process(
+                target=run_model_worker,
+                name=f"model_worker({os.getpid()})",
+                args=(args.model_name, args.controller_address, queue, len(processes) + 1),
+                daemon=True,
+            )
+            process.start()
+            processes["model_worker"] = process
 
     if args.api:
         process = Process(