feat: cycle

backend/services/price_cache.py

@@ -0,0 +1,41 @@
+"""
+Cycle Actions — standalone "refresh-price-data" action.
+
+Downloads fresh OHLCV for every watchlist instrument and caches it in
+price_data_cache. Deliberately independent from the technical-indicators /
+wavelet code paths (which each do their own live yfinance fetch) — this is an
+inspection/refresh tool for decomposing a cycle, not a shared cache other
+steps depend on, so it can't regress the already-tested live cycle path.
+"""
+import logging
+from typing import Any, Dict
+
+logger = logging.getLogger(__name__)
+
+
+def refresh_watchlist_price_data(period: str = "3mo") -> Dict[str, Any]:
+    from services.database import get_instruments_watchlist, upsert_price_data
+    from services.data_fetcher import get_historical
+
+    tickers = [w["ticker"] for w in get_instruments_watchlist()]
+    per_ticker: Dict[str, int] = {}
+    failed = []
+
+    for ticker in tickers:
+        try:
+            rows = get_historical(ticker, period=period, interval="1d")
+            if not rows:
+                failed.append(ticker)
+                continue
+            n = upsert_price_data(ticker, rows)
+            per_ticker[ticker] = n
+        except Exception as e:
+            logger.warning(f"[PriceCache] Failed to refresh {ticker}: {e}")
+            failed.append(ticker)
+
+    return {
+        "tickers_refreshed": len(per_ticker),
+        "rows_written": sum(per_ticker.values()),
+        "per_ticker": per_ticker,
+        "failed": failed,
+    }