_run_kis_minute_cycle: portfolio + screener union 종목 분봉 fetch +
screener-only 종목 호가 REST fetch. WebSocket callback factory
(make_asking_price_callback).
poll_loop / _run_polling_cycle 에 kis_client optional param 추가
(Phase 5 까지 None 일 때도 정상 동작).
2 new tests pass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
poll_loop: asyncio.gather parallel fetch of 3 endpoints (portfolio,
news_sentiment, screener_preview) + state update. main.py: FastAPI
lifespan creates StockClient/SignalDedup/shutdown.Event then spawns
poll_loop as background task. GET /health reports status, last poll
times, cache size.
Signal V2 test suite: 19/19 PASS.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>