fix: persist sell prices to DB and add WF filter bootstrap

- price_db: add sell_prices table (ensure/upsert/load/delete)
- trader: restore _last_sell_prices from DB on startup so re-entry
  block survives restarts; persist each sell price immediately
- market: retry chunk requests up to 3 times with backoff on 429

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

core/market.py

@@ -29,15 +29,27 @@ def get_top_tickers() -> list[str]:
         if not all_tickers:
             return []
 
-        # 100개씩 나눠서 조회 (URL 길이 제한)
+        # 100개씩 나눠서 조회 (URL 길이 제한, 429 재시도 포함)
         chunk_size = 100
         ticker_data = []
         for i in range(0, len(all_tickers), chunk_size):
             chunk = all_tickers[i:i + chunk_size]
             params = {"markets": ",".join(chunk)}
-            resp = requests.get(_TICKER_URL, params=params, timeout=5)
-            resp.raise_for_status()
-            ticker_data.extend(resp.json())
+            for attempt in range(3):
+                try:
+                    resp = requests.get(_TICKER_URL, params=params, timeout=5)
+                    if resp.status_code == 429:
+                        wait = 2 ** attempt  # 1s → 2s → 4s
+                        logger.warning(f"429 Rate Limit, {wait}s 대기 후 재시도 ({attempt+1}/3)")
+                        time.sleep(wait)
+                        continue
+                    resp.raise_for_status()
+                    ticker_data.extend(resp.json())
+                    break
+                except Exception as e:
+                    if attempt == 2:
+                        raise
+                    time.sleep(1)
 
         # 스테이블코인 제외
         EXCLUDE = {"KRW-USDT", "KRW-USDC", "KRW-DAI", "KRW-BUSD"}

core/price_db.py

@@ -196,6 +196,56 @@ def load_recent_wins(ticker: str, n: int = 5) -> list[bool]:
     return [bool(r[0]) for r in rows]
 
 
+# ── 직전 매도가 영구 저장 (재시작 후 재매수 차단 유지용) ──────────────────────
+
+def ensure_sell_prices_table() -> None:
+    """sell_prices 테이블이 없으면 생성."""
+    ddl = """
+        CREATE TABLE sell_prices (
+            ticker     VARCHAR2(20) NOT NULL PRIMARY KEY,
+            price      NUMBER(20,8) NOT NULL,
+            updated_at TIMESTAMP    DEFAULT SYSTIMESTAMP NOT NULL
+        )
+    """
+    with _conn() as conn:
+        try:
+            conn.cursor().execute(ddl)
+        except oracledb.DatabaseError as e:
+            if e.args[0].code != 955:  # ORA-00955: 이미 존재
+                raise
+
+
+def upsert_sell_price(ticker: str, price: float) -> None:
+    """직전 매도가 저장 또는 갱신."""
+    sql = """
+        MERGE INTO sell_prices s
+        USING (SELECT :ticker AS ticker FROM dual) d
+        ON (s.ticker = d.ticker)
+        WHEN MATCHED THEN
+            UPDATE SET price = :price, updated_at = SYSTIMESTAMP
+        WHEN NOT MATCHED THEN
+            INSERT (ticker, price) VALUES (:ticker, :price)
+    """
+    with _conn() as conn:
+        conn.cursor().execute(sql, {"ticker": ticker, "price": price})
+
+
+def load_sell_prices() -> dict[str, float]:
+    """저장된 직전 매도가 전체 로드."""
+    with _conn() as conn:
+        cur = conn.cursor()
+        cur.execute("SELECT ticker, price FROM sell_prices")
+        return {r[0]: float(r[1]) for r in cur.fetchall()}
+
+
+def delete_sell_price(ticker: str) -> None:
+    """매도가 기록 삭제 (더 이상 필요 없을 때)."""
+    with _conn() as conn:
+        conn.cursor().execute(
+            "DELETE FROM sell_prices WHERE ticker = :ticker", {"ticker": ticker}
+        )
+
+
 def load_positions() -> list[dict]:
     """저장된 전체 포지션 로드."""
     sql = """

core/trader.py

@@ -15,6 +15,7 @@ from .notify import notify_buy, notify_sell, notify_error
 from .price_db import (
     delete_position, load_positions, upsert_position,
     ensure_trade_results_table, record_trade, load_recent_wins,
+    ensure_sell_prices_table, upsert_sell_price, load_sell_prices,
 )
 
 load_dotenv()
@@ -97,12 +98,26 @@ def restore_positions() -> None:
 
     DB에 저장된 실제 매수가를 복원하고, Upbit 잔고에 없으면 DB에서도 삭제한다.
     """
-    # trade_results 테이블 초기화
+    # trade_results / sell_prices 테이블 초기화
     try:
         ensure_trade_results_table()
     except Exception as e:
         logger.warning(f"trade_results 테이블 생성 실패 (무시): {e}")
 
+    try:
+        ensure_sell_prices_table()
+    except Exception as e:
+        logger.warning(f"sell_prices 테이블 생성 실패 (무시): {e}")
+
+    # 직전 매도가 복원 (재매수 차단 기준 유지)
+    try:
+        loaded = load_sell_prices()
+        _last_sell_prices.update(loaded)
+        if loaded:
+            logger.info(f"[복원] 직전 매도가 {len(loaded)}건 복원: {list(loaded.keys())}")
+    except Exception as e:
+        logger.warning(f"직전 매도가 복원 실패 (무시): {e}")
+
     # DB에서 저장된 포지션 로드
     try:
         saved = {row["ticker"]: row for row in load_positions()}
@@ -291,6 +306,10 @@ def sell(ticker: str, reason: str = "") -> bool:
             notify_sell(ticker, current, pnl, reason)
             if current:
                 _last_sell_prices[ticker] = current  # 재매수 기준가 기록
+                try:
+                    upsert_sell_price(ticker, current)  # DB 영구 저장
+                except Exception as e:
+                    logger.error(f"직전 매도가 DB 저장 실패 {ticker}: {e}")
             _update_history(ticker, pnl > 0, pnl)   # walk-forward 이력 갱신
             del _positions[ticker]
             try: