Fix: ollama model add error. (#5947)

### What problem does this PR solve?

#5944

### Type of change

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

api/apps/llm_app.py

 
         llm_set = set([m["llm_name"] + "@" + m["fid"] for m in llms])
         for o in objs:
-            if not o.api_key:
-                continue
             if o.llm_name + "@" + o.llm_factory in llm_set:
                 continue
             llms.append({"llm_name": o.llm_name, "model_type": o.model_type, "fid": o.llm_factory, "available": True})

api/apps/sdk/session.py

                     answer = ans["answer"]
                     incremental = answer[should_split_index:]
                     token_used += len(incremental)
-
-                    """
-                    bugfix: When calling the Create chat completion API, the response data is incoherent.
-                    bug code: token_used += len(incremental)
-                    fix author: 任奇
-                    """
                     if incremental.endswith("</think>"):
                         response_data_len = len(incremental.rstrip("</think>"))
                     else: