Fix code style: Apply ruff linting fixes

- Break long lines to comply with 88 character limit
- Fix import sorting in test files
- Improve code readability with proper line breaks

Author: fede-kamel

libs/oci/langchain_oci/chat_models/oci_generative_ai.py

@@ -367,9 +367,7 @@ def messages_to_oci_params(
                     self.oci_chat_message[self.get_role(msg)](
                         tool_results=[
                             self.oci_tool_result(
-                                call=self.oci_tool_call(
-                                    name=msg.name, parameters={}
-                                ),
+                                call=self.oci_tool_call(name=msg.name, parameters={}),
                                 outputs=[{"output": msg.content}],
                             )
                         ],
@@ -381,9 +379,17 @@ def messages_to_oci_params(
         for i, message in enumerate(messages[::-1]):
             current_turn.append(message)
             if isinstance(message, HumanMessage):
-                if len(messages) > i and isinstance(messages[len(messages) - i - 2], ToolMessage):
-                    # add dummy message REPEATING the tool_result to avoid the error about ToolMessage needing to be followed by an AI message
-                    oci_chat_history.append(self.oci_chat_message['CHATBOT'](message=messages[len(messages) - i - 2].content))
+                if len(messages) > i and isinstance(
+                    messages[len(messages) - i - 2], ToolMessage
+                ):
+                    # add dummy message REPEATING the tool_result to avoid
+                    # the error about ToolMessage needing to be followed
+                    # by an AI message
+                    oci_chat_history.append(
+                        self.oci_chat_message["CHATBOT"](
+                            message=messages[len(messages) - i - 2].content
+                        )
+                    )
                 break
         current_turn = list(reversed(current_turn))
 
@@ -713,8 +719,8 @@ def messages_to_oci_params(
                 else:
                     oci_message = self.oci_chat_message[role](content=tool_content)
             elif isinstance(message, AIMessage) and (
-                message.tool_calls or
-                message.additional_kwargs.get("tool_calls")):
+                message.tool_calls or message.additional_kwargs.get("tool_calls")
+            ):
                 # Process content and tool calls for assistant messages
                 content = self._process_message_content(message.content)
                 tool_calls = []
@@ -741,10 +747,11 @@ def messages_to_oci_params(
             "api_format": self.chat_api_format,
         }
 
-        # BUGFIX: If tool results have been received and tools are bound, set tool_choice to "none"
-        # to prevent the model from making additional tool calls in a loop.
-        # This addresses a known issue with Meta Llama models that continue calling tools
-        # even after receiving results.
+        # BUGFIX: If tool results have been received and tools are bound,
+        # set tool_choice to "none" to prevent the model from making
+        # additional tool calls in a loop.
+        # This addresses a known issue with Meta Llama models that
+        # continue calling tools even after receiving results.
         has_tool_results = any(isinstance(msg, ToolMessage) for msg in messages)
         if has_tool_results and "tools" in kwargs and "tool_choice" not in kwargs:
             result["tool_choice"] = self.oci_tool_choice_none()
@@ -944,6 +951,7 @@ def process_stream_tool_calls(
 
 class MetaProvider(GenericProvider):
     """Provider for Meta models. This provider is for backward compatibility."""
+
     pass