style: ruff format

backend/routes/ask.py

@@ -813,9 +813,17 @@ async def ask_question(body: AskRequest, user: dict = Depends(require_auth)):
             try:
                 answer = await _call_llm(question, events, total=total, excluded_services=excluded_services)
                 llm_used = True
-                await set_cached_ask(redis, question, filters_snapshot, events, {
-                    "answer": answer, "llm_used": True, "llm_error": None,
-                })
+                await set_cached_ask(
+                    redis,
+                    question,
+                    filters_snapshot,
+                    events,
+                    {
+                        "answer": answer,
+                        "llm_used": True,
+                        "llm_error": None,
+                    },
+                )
             except Exception as exc:
                 llm_error = f"LLM call failed: {exc}"
                 logger.warning("LLM call failed, falling back to structured summary", error=str(exc))