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/inspection.py

@@ -0,0 +1,37 @@
+from pydantic import BaseModel
+from typing import Optional
+from datetime import datetime
+
+
+class InspectionLocationCreate(BaseModel):
+    code: str
+    name: str
+    description: Optional[str] = None
+    sort_order: int = 0
+
+
+class InspectionLocationOut(InspectionLocationCreate):
+    id: int
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class InspectionRecordCreate(BaseModel):
+    location_id: int
+    equipment_code: Optional[str] = None
+    equipment_name: Optional[str] = None
+    scan_code: Optional[str] = None
+    inspector: str
+    result: str = "normal"
+    notes: Optional[str] = None
+
+
+class InspectionRecordOut(InspectionRecordCreate):
+    id: int
+    location_name: Optional[str] = None
+    created_at: datetime
+
+    class Config:
+        from_attributes = True