1.修改推理逻辑，useflag为1的也参与推理，之前是不用的点是1，正常的是0，现在发现正常的也有1，目前未知此参数具体作用。

app/services/settlement_data.py

@@ -30,6 +30,21 @@ class SettlementDataService(BaseService[SettlementData]):
     def get_by_nyid(self, db: Session, nyid: str) -> List[SettlementData]:
         """根据期数ID获取沉降数据"""
         return self.get_by_field(db, "NYID", nyid)
+
+    def get_one_dict_by_nyid(self, db: Session, nyid: str) -> Optional[Dict[str, Any]]:
+        """根据期数ID取一条沉降记录并转为字典（供推理/到期计算用，datetime 转为字符串）"""
+        row = db.query(SettlementData).filter(SettlementData.NYID == nyid).first()
+        if not row:
+            return None
+        field_names = [c.name for c in SettlementData.__table__.columns]
+        item = {}
+        for k in field_names:
+            v = getattr(row, k)
+            if isinstance(v, datetime):
+                item[k] = v.strftime("%Y-%m-%d %H:%M:%S")
+            else:
+                item[k] = v
+        return item
     def get_by_nyid_and_point_id(self, db: Session, nyid: str, point_id: str) -> List[SettlementData]:
         """根据期数ID和观测点ID获取沉降数据"""
         return self.get_by_field(db, "NYID", nyid, "point_id", point_id)