feat(llm): support incremental Responses WebSocket transport

artemis/services/llm.py

@@ -1174,6 +1174,7 @@ def _resolve_endpoint(
         else settings.OPENAI_MAX_RETRIES,
         max_tokens=_get_val(cfg, "max_tokens", int),
         api_base=_get_val(cfg, "api_base", str),
+        transport=_get_val(cfg, "transport", str) or settings.OPENAI_TRANSPORT,
         reasoning_effort=_get_val(cfg, "reasoning_effort", str),
         enable_grounding=_get_val(cfg, "enable_grounding", bool) or False,
     )