Skip used/residual expiries so ATM monitors the next day.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/strategy/clock.py

@@ -59,6 +59,20 @@ def used_expiry_ymds_for_day(db: Any, now: datetime | None = None) -> set[str]:
     return out
 
 
+def pending_residual_expiry_ymds(db: Any) -> set[str]:
+    """待到期结算的残留期权到期日（YYMMDD）；监控/下一组开仓应跳过这些档。"""
+    rows = db.fetchall(
+        """SELECT DISTINCT expiry_ymd FROM residual_options
+           WHERE status='pending' AND expiry_ymd IS NOT NULL AND TRIM(expiry_ymd) != ''"""
+    )
+    out: set[str] = set()
+    for r in rows or []:
+        y = str(r["expiry_ymd"] or "").strip()
+        if y:
+            out.add(y)
+    return out
+
+
 def expiry_blocked_by_one_per_day(
     expiry_ymd: str | None,
     used: set[str],