feat: srategy builder

backend/services/database.py

@@ -6138,6 +6138,27 @@ def get_saxo_snapshot_symbols() -> List[Dict[str, Any]]:
     return [dict(r) for r in rows]
 
 
+def get_latest_saxo_snapshot_rows(symbol: str) -> List[Dict[str, Any]]:
+    """One row per (expiry_date, strike, option_type) — the freshest of the accumulated
+    5-min snapshots for that contract, not the whole history. Powers the Strategy Builder,
+    which reads exclusively from this accumulated history (no live yfinance/Saxo call)."""
+    conn = get_conn()
+    rows = conn.execute("""
+        SELECT s.* FROM saxo_option_snapshots s
+        JOIN (
+            SELECT expiry_date, strike, option_type, MAX(created_at) AS max_created
+            FROM saxo_option_snapshots WHERE symbol = ?
+            GROUP BY expiry_date, strike, option_type
+        ) latest
+        ON s.expiry_date = latest.expiry_date AND s.strike = latest.strike
+           AND s.option_type = latest.option_type AND s.created_at = latest.max_created
+        WHERE s.symbol = ?
+        ORDER BY s.expiry_date, s.strike
+    """, (symbol, symbol)).fetchall()
+    conn.close()
+    return [dict(r) for r in rows]
+
+
 def upsert_saxo_catalog_rows(rows: List[Dict[str, Any]]):
     if not rows:
         return