NXT 시간외 거래 시간대도 5분 cron 폴링 활성화. 23:30-04:30 dead zone
(KIS 점검) → 04:30 까지 skip. 기존 _seconds_until_next_market_open
(휴장일/주말용) 와 별개로 _seconds_until_nxt_or_market_open 신설.
3 new tests, scheduler suite 11 passed.
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>
SignalDedup: 24h-rolling duplicate signal blocker. SQLite WAL +
busy_timeout=120000 standard fix (reference_sqlite_concurrency.md
pattern). PK (ticker, action) with UPSERT. Phase 4 (signal generator)
will call is_recent() before sending + record() after sending.
3 unit tests pass, total 17 signal_v2.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Time-window dispatcher: pre-market (07:00-09:00, 5min), market
(09:00-15:30, 1min), post-market (15:30-20:00, 5min), overnight skip
to next market day 07:00. Weekend + holiday detection via holidays.json.
Stub holidays.json with 13 dates. Task 6 will sync from
web-backend/stock/app/holidays.json.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
