refactor(structure): reorganize app layout

BREAKING CHANGE: root backend/frontend directories and old run/manage entrypoints were removed. Use apps/backend, apps/frontend, and python main.py commands instead.

apps/backend/models/check_in_record.py

@@ -0,0 +1,31 @@
+from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, Index
+from sqlalchemy.orm import relationship
+from datetime import datetime, timezone
+from backend.models.database import Base
+
+
+class CheckInRecord(Base):
+    """打卡记录模型"""
+
+    __tablename__ = "check_in_records"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    task_id = Column(Integer, ForeignKey("check_in_tasks.id", ondelete="CASCADE"), nullable=False, index=True, comment="任务 ID")
+    status = Column(String(20), nullable=False, index=True, comment="状态: success/failure/out_of_time/unknown/pending")
+    response_text = Column(Text, default="", comment="响应文本")
+    error_message = Column(Text, default="", comment="错误信息")
+    location = Column(Text, default="{}", comment="位置信息 JSON")
+    trigger_type = Column(String(50), default="scheduled", comment="触发类型: scheduled/manual/admin")
+    check_in_time = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), index=True, comment="打卡时间（UTC）")
+
+    # 关联任务
+    task = relationship("CheckInTask", back_populates="check_in_records")
+
+    # 添加复合索引：加速常见查询
+    __table_args__ = (
+        Index('ix_record_task_time', 'task_id', 'check_in_time'),  # 获取任务的打卡记录(按时间排序)
+        Index('ix_record_status_time', 'status', 'check_in_time'),  # 按状态和时间查询
+    )
+
+    def __repr__(self):
+        return f"<CheckInRecord(id={self.id}, task_id={self.task_id}, status={self.status})>"