feat(stock): get_holdings (현재가·손익·KRX판별)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

stock/app/holdings_intel.py

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+"""보유종목 인텔리전스 — 순수연산 중심 (advisory). KIS 실주문 미사용."""
+from __future__ import annotations
+import datetime as dt
+from typing import Any, Optional
+
+from . import db
+from . import price_fetcher
+
+
+def _krx_tickers() -> set:
+    """krx_master에 존재하는 ticker 집합 (KRX 판별용)."""
+    with db._conn() as conn:
+        try:
+            rows = conn.execute("SELECT ticker FROM krx_master").fetchall()
+        except Exception:
+            return set()
+    return {r["ticker"] for r in rows}
+
+
+def get_holdings() -> list[dict]:
+    """portfolio + 현재가 + pnl_rate + is_krx."""
+    items = db.get_all_portfolio()
+    tickers = [it["ticker"] for it in items]
+    prices = price_fetcher.get_current_prices(tickers) if tickers else {}
+    krx = _krx_tickers()
+    out = []
+    for it in items:
+        cur = prices.get(it["ticker"])
+        avg = it["avg_price"]
+        pnl = ((cur - avg) / avg * 100.0) if (cur and avg) else None
+        out.append({
+            **it,
+            "current_price": cur,
+            "pnl_rate": pnl,
+            "is_krx": it["ticker"] in krx,
+        })
+    return out