feat(stock): session 판정 + webai monitor-set 엔드포인트

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EqCYBhvTcdeCTUDX3RhWx9

stock/app/main.py

@@ -29,6 +29,9 @@ from .ai_summarizer import summarize_news, OllamaError
 from .auth import verify_webai_key
 from . import webai_cache
 from . import holdings_intel
+from .trade_alerts import (
+    build_monitor_set, current_session, DEFAULT_EXIT_PARAMS, DEFAULT_BUY_PARAMS,
+)
 
 app = FastAPI()
 install_access_log(app)
@@ -507,6 +510,28 @@ def get_webai_news_sentiment(date: str | None = None):
     return result
 
 
+@app.get("/api/webai/trade-alert/monitor-set", dependencies=[Depends(verify_webai_key)])
+def get_trade_alert_monitor_set():
+    """web-ai(Windows 워커) 전용 — 실시간 매매 알람 감시대상 조립 (계약 §5.1).
+
+    session은 KST 시각으로 pre/regular/after 판정 후, 평일·휴장 여부(is_market_open)를
+    함께 게이팅해 최종 closed 여부를 결정한다.
+    """
+    from datetime import datetime, timezone, timedelta
+    kst = timezone(timedelta(hours=9))
+    now_kst = datetime.now(kst)
+    session = current_session(now_kst)
+    if not is_market_open(now_kst.date()):
+        session = "closed"
+
+    from .db import _conn
+    conn = _conn()
+    try:
+        return build_monitor_set(conn, session, DEFAULT_EXIT_PARAMS, DEFAULT_BUY_PARAMS)
+    finally:
+        conn.close()
+
+
 @app.post("/api/portfolio", status_code=201)
 def create_portfolio_item(req: PortfolioItemRequest):
     """포트폴리오 종목 추가"""