feat: 新建工单体系三表（security_work_order/security_user/work_order_log）

- SecurityWorkOrder: 安保工单表，关联alarm_event一对一，支持告警生成和手动创建
  含派发人信息冗余（责任追溯）、告警合并索引
- SecurityUser: 安保人员表，含企微uid、角色、班组
- WorkOrderLog: 工单操作记录，追踪CREATE/DISPATCH/ACCEPT/FINISH/CLOSE

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/models.py

@@ -368,6 +368,138 @@ class AlarmLlmAnalysis(Base):
         }
 
 
+# ==================== 工单体系 ====================
+
+class SecurityUser(Base):
+    """安保人员表"""
+    __tablename__ = "security_user"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    user_id = Column(String(64), unique=True, nullable=False, index=True, comment="人员唯一ID")
+    name = Column(String(100), nullable=False, comment="姓名")
+    phone = Column(String(20), nullable=True, comment="手机号")
+    wechat_uid = Column(String(100), nullable=True, comment="企微userid")
+    role = Column(String(50), default="guard", comment="角色: guard/supervisor/manager")
+    team_id = Column(String(64), nullable=True, index=True, comment="班组ID")
+    status = Column(String(20), default="active", comment="状态: active/inactive")
+    created_at = Column(DateTime, default=lambda: beijing_now())
+    updated_at = Column(DateTime, default=lambda: beijing_now(),
+                        onupdate=lambda: beijing_now())
+
+    def to_dict(self) -> dict:
+        fmt = '%Y-%m-%d %H:%M:%S'
+        return {
+            "id": self.id,
+            "user_id": self.user_id,
+            "name": self.name,
+            "phone": self.phone,
+            "wechat_uid": self.wechat_uid,
+            "role": self.role,
+            "team_id": self.team_id,
+            "status": self.status,
+            "created_at": self.created_at.strftime(fmt) if self.created_at else None,
+            "updated_at": self.updated_at.strftime(fmt) if self.updated_at else None,
+        }
+
+
+class SecurityWorkOrder(Base):
+    """安保工单表"""
+    __tablename__ = "security_work_order"
+
+    order_id = Column(String(64), primary_key=True, comment="工单ID: WO + 时间戳 + uuid")
+
+    # 来源告警（告警工单必填，手动工单可空）
+    alarm_id = Column(String(64), nullable=True, unique=True, comment="关联 alarm_event.alarm_id")
+
+    # 工单内容
+    title = Column(String(200), nullable=False, comment="工单标题")
+    description = Column(Text, nullable=True, comment="工单描述")
+    priority = Column(SmallInteger, default=2, comment="优先级: 1低 2中 3高 4紧急")
+
+    # 设备/区域信息（冗余，方便查询和责任追溯）
+    camera_id = Column(String(64), nullable=True, comment="摄像头ID")
+    roi_id = Column(String(64), nullable=True, comment="ROI区域ID")
+    alarm_type = Column(String(50), nullable=True, comment="告警类型")
+    image_url = Column(String(512), nullable=True, comment="截图URL")
+
+    # 派发信息（写入时确定，不依赖实时查询，确保责任可追溯）
+    assigned_user_id = Column(String(64), nullable=True, index=True, comment="处理人user_id")
+    assigned_user_name = Column(String(100), nullable=True, comment="处理人姓名")
+    assigned_team_id = Column(String(64), nullable=True, comment="班组ID")
+
+    # 状态: PENDING / DISPATCHED / PROCESSING / DONE / CLOSED
+    status = Column(String(20), default="PENDING", nullable=False, index=True, comment="工单状态")
+
+    # 处理结果
+    result = Column(Text, nullable=True, comment="处理结果描述")
+
+    # 创建人
+    created_by = Column(String(64), nullable=True, comment="创建人")
+
+    # 时间
+    created_at = Column(DateTime, default=lambda: beijing_now())
+    updated_at = Column(DateTime, default=lambda: beijing_now(),
+                        onupdate=lambda: beijing_now())
+    dispatch_time = Column(DateTime, nullable=True, comment="派单时间")
+    finish_time = Column(DateTime, nullable=True, comment="完成时间")
+
+    __table_args__ = (
+        Index('idx_swo_status', 'status'),
+        Index('idx_swo_assigned', 'assigned_user_id'),
+        Index('idx_swo_created_at', 'created_at'),
+        Index('idx_swo_camera_roi_type', 'camera_id', 'roi_id', 'alarm_type'),
+    )
+
+    def to_dict(self) -> dict:
+        fmt = '%Y-%m-%d %H:%M:%S'
+        return {
+            "order_id": self.order_id,
+            "alarm_id": self.alarm_id,
+            "title": self.title,
+            "description": self.description,
+            "priority": self.priority,
+            "camera_id": self.camera_id,
+            "roi_id": self.roi_id,
+            "alarm_type": self.alarm_type,
+            "image_url": self.image_url,
+            "assigned_user_id": self.assigned_user_id,
+            "assigned_user_name": self.assigned_user_name,
+            "assigned_team_id": self.assigned_team_id,
+            "status": self.status,
+            "result": self.result,
+            "created_by": self.created_by,
+            "created_at": self.created_at.strftime(fmt) if self.created_at else None,
+            "updated_at": self.updated_at.strftime(fmt) if self.updated_at else None,
+            "dispatch_time": self.dispatch_time.strftime(fmt) if self.dispatch_time else None,
+            "finish_time": self.finish_time.strftime(fmt) if self.finish_time else None,
+        }
+
+
+class WorkOrderLog(Base):
+    """工单操作记录表"""
+    __tablename__ = "work_order_log"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    order_id = Column(String(64), nullable=False, index=True, comment="关联工单ID")
+    action = Column(String(50), nullable=False,
+                    comment="操作: CREATE/DISPATCH/ACCEPT/FINISH/CLOSE")
+    operator_id = Column(String(64), nullable=True, comment="操作人ID")
+    operator_name = Column(String(100), nullable=True, comment="操作人姓名")
+    remark = Column(Text, nullable=True, comment="备注")
+    created_at = Column(DateTime, default=lambda: beijing_now())
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "order_id": self.order_id,
+            "action": self.action,
+            "operator_id": self.operator_id,
+            "operator_name": self.operator_name,
+            "remark": self.remark,
+            "created_at": self.created_at.strftime('%Y-%m-%d %H:%M:%S') if self.created_at else None,
+        }
+
+
 # ==================== 数据库管理 ====================
 
 _engine = None