增加daily_diff 增删查业务

app/models/daily_diff.py

@@ -0,0 +1,21 @@
+from sqlalchemy import Column, BigInteger, String, Date
+from ..core.database import Base
+
+class DailyDiff(Base):
+    __tablename__ = "daily_diff"
+
+    id = Column(BigInteger, primary_key=True, index=True, autoincrement=True)
+    account_id = Column(BigInteger, nullable=False, comment="账号ID", index=True)
+    account_name = Column(String(100), comment="账号名称")
+    check_time = Column(Date, comment="检查时间", index=True)
+    linecode = Column(String(100), comment="线路编码", index=True)
+
+    def to_dict(self):
+        """将模型实例转换为字典"""
+        return {
+            "id": self.id,
+            "account_id": self.account_id,
+            "account_name": self.account_name,
+            "check_time": self.check_time.strftime("%Y-%m-%d") if self.check_time else None,
+            "linecode": self.linecode
+        }