参数错误

**Describe the bug**
> Traceback (most recent call last):
File "/Users/wufagang/project/giteeproject/OxyGent/oxygent/oxy/base_oxy.py", line 612, in execute
oxy_response = await self._execute(oxy_request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/wufagang/project/giteeproject/OxyGent/oxygent/oxy/llms/http_llm.py", line 152, in _execute
raise ValueError(f"LLM API error: {error_message}")
ValueError: LLM API error: Unrecognized request argument supplied: llm_params

2025-09-16 20:50:49,329 - ERROR - JGDwCeLu74n5iurs - YuTKUhMJMxiYeSi7 - Max retries reached. Failed. Traceback (most recent call last):
File "/Users/wufagang/project/giteeproject/OxyGent/oxygent/oxy/base_oxy.py", line 612, in execute
oxy_response = await self._execute(oxy_request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/wufagang/project/giteeproject/OxyGent/oxygent/oxy/llms/http_llm.py", line 152, in _execute
raise ValueError(f"LLM API error: {error_message}")
ValueError: LLM API error: Unrecognized request argument supplied: llm_params

Start with oxygent/oxy/llms/http_llm.py around _execute at line 152, then trace the request path from oxygent/oxy/base_oxy.py around execute at line 612. Determine where llm_params enters the request and verify the completed change by reproducing the reported LLM API call without the unrecognized-argument error.

Written by the indexing model from the issue text.