fix: split agents import onto separate lines to satisfy isort

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: jsonbailey

packages/ai-providers/server-ai-openai/src/ldai_openai/openai_agent_runner.py

@@ -63,7 +63,8 @@ async def run(
             metrics including aggregated token usage and observed ``tool_calls``.
         """
         try:
-            from agents import Agent, Runner as _Runner
+            from agents import Agent
+            from agents import Runner as _Runner
         except ImportError:
             log.warning(
                 "openai-agents is required for OpenAIAgentRunner. "