feat: persist probe quality and notification outbox

backend/app/models/ping_record.py

@@ -1,18 +1,32 @@
 from datetime import datetime
-from sqlalchemy import Column, Integer, Float, Boolean, DateTime, BigInteger
+from sqlalchemy import BigInteger, Boolean, Column, DateTime, Float, Index, Integer, String
 from .device import Base
 
 
+PRIMARY_KEY_TYPE = BigInteger().with_variant(Integer, "sqlite")
+
+
 class PingRecord(Base):
     """单次 ping 结果记录"""
     __tablename__ = "ping_records"
 
-    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    id = Column(PRIMARY_KEY_TYPE, primary_key=True, autoincrement=True)
     device_id = Column(Integer, nullable=False, index=True)
     is_alive = Column(Boolean, nullable=False, comment="是否通")
     response_time_ms = Column(Float, nullable=True, comment="响应时间毫秒，不通则为 NULL")
     round_num = Column(Integer, nullable=False, comment="轮次编号（从 1 递增）")
     created_at = Column(DateTime, default=datetime.now, index=True, comment="记录时间")
 
+    sent_count = Column(Integer, nullable=True, comment="本轮发包数")
+    received_count = Column(Integer, nullable=True, comment="本轮收包数")
+    packet_loss_percent = Column(Float, nullable=True, comment="本轮丢包率百分比")
+    average_rtt_ms = Column(Float, nullable=True, comment="本轮平均时延毫秒")
+    is_valid = Column(Boolean, nullable=False, default=True, comment="探测结果是否有效")
+    failure_reason = Column(String(512), nullable=True, comment="无效探测的原因")
+
+    __table_args__ = (
+        Index("idx_ping_records_device_created_at", "device_id", "created_at"),
+    )
+
     def __repr__(self):
         return f"<PingRecord(device={self.device_id}, alive={self.is_alive}, rtt={self.response_time_ms})>"