Fix:TypeError: OllamaCV.chat() got an unexpected keyword argument 'stop' (#9363)

### What problem does this PR solve?

https://github.com/infiniflow/ragflow/issues/9351
Support filter argument before invoking
### Type of change

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

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

api/db/services/llm_service.py

@@ -13,6 +13,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
+import inspect
 import logging
 import re
 from functools import partial
@@ -377,7 +378,24 @@ class LLMBundle:
             return txt
 
         return txt[last_think_end + len("</think>") :]
-
+    
+    @staticmethod
+    def _clean_param(chat_partial, **kwargs):
+        func = chat_partial.func
+        sig = inspect.signature(func)
+        keyword_args = []
+        support_var_args = False
+        for param in sig.parameters.values():
+            if param.kind == inspect.Parameter.VAR_KEYWORD or param.kind == inspect.Parameter.VAR_POSITIONAL:
+                support_var_args = True
+            elif param.kind == inspect.Parameter.KEYWORD_ONLY:
+                keyword_args.append(param.name)
+
+        use_kwargs = kwargs
+        if not support_var_args:
+            use_kwargs = {k: v for k, v in kwargs.items() if k in keyword_args}
+        return use_kwargs
+        
     def chat(self, system: str, history: list, gen_conf: dict = {}, **kwargs) -> str:
         if self.langfuse:
             generation = self.langfuse.start_generation(trace_context=self.trace_context, name="chat", model=self.llm_name, input={"system": system, "history": history})
@@ -385,8 +403,9 @@ class LLMBundle:
         chat_partial = partial(self.mdl.chat, system, history, gen_conf)
         if self.is_tools and self.mdl.is_tools:
             chat_partial = partial(self.mdl.chat_with_tools, system, history, gen_conf)
-
-        txt, used_tokens = chat_partial(**kwargs)
+            
+        use_kwargs = self._clean_param(chat_partial, **kwargs)
+        txt, used_tokens = chat_partial(**use_kwargs)
         txt = self._remove_reasoning_content(txt)
 
         if not self.verbose_tool_use:
@@ -410,8 +429,8 @@ class LLMBundle:
         total_tokens = 0
         if self.is_tools and self.mdl.is_tools:
             chat_partial = partial(self.mdl.chat_streamly_with_tools, system, history, gen_conf)
-
-        for txt in chat_partial(**kwargs):
+        use_kwargs = self._clean_param(chat_partial, **kwargs)
+        for txt in chat_partial(**use_kwargs):
             if isinstance(txt, int):
                 total_tokens = txt
                 if self.langfuse: