docs: Clarify config parameter behavior in factory.py

Address CodeRabbit recommendation to document that the config
parameter is only used by simple and hierarchical modes.
Advanced mode uses settings.advanced_max_rounds instead.

src/orchestrators/factory.py

@@ -72,6 +72,8 @@ def create_orchestrator(
         search_handler: The search handler (required for simple mode)
         judge_handler: The judge handler (required for simple mode)
         config: Optional configuration (max_iterations, timeouts, etc.)
+                Note: This parameter is only used by simple and hierarchical modes.
+                Advanced mode uses settings.advanced_max_rounds instead.
         mode: "simple", "magentic", "advanced", or "hierarchical"
               Note: "magentic" is an alias for "advanced" (kept for backwards compatibility)
         api_key: Optional API key for advanced mode (OpenAI)