feat: 移除PDI和订单号字段，新增设备巡检模块

- 从物料跟踪页面移除订单号列和表单字段
- 从导航菜单移除PDI管理，添加设备巡检
- 新增InspectionLocation和InspectionRecord后端模型和API
- 新增设备巡检前端页面（左侧点位列表，右侧设备和历史记录）

backend/app/schemas/__init__.py

@@ -0,0 +1,7 @@
+from app.schemas.common import Response, PageResponse, PageParams
+from app.schemas.user import UserCreate, UserUpdate, UserOut, Token, LoginRequest
+from app.schemas.material import CoilCreate, CoilUpdate, CoilOut, TrackingCreate, TrackingOut
+from app.schemas.production import ProductionRecordCreate, ProductionRecordUpdate, ProductionRecordOut
+from app.schemas.plan import PlanCreate, PlanUpdate, PlanOut
+from app.schemas.downtime import DowntimeCreate, DowntimeUpdate, DowntimeOut, CategoryCreate, CategoryOut
+from app.schemas.equipment import EquipmentCreate, EquipmentUpdate, EquipmentOut, MaintenanceCreate, MaintenanceOut