批次5：inventory服务下沉收口 + Pydantic v2 / datetime弃用清零

- inventory业务层下沉（薄路由+service orchestration模式）：
  - customer/supplier/warehouse -> master_data_service
  - material_routes（价格历史/趋势/供应商关联）-> material_service
  - product_routes（CRUD/BOM/from-task跨模块桥接）-> product_service
  - dashboard_routes（首页统计/低库存预警）-> dashboard_service
- inventory侧新增service回归覆盖（dashboard 2 / master_data 10 /
  material 10 / product 14），含跨模块桥接测试种子
- Pydantic v2弃用清零：全仓14处 class Config 全部迁移到
  model_config = ConfigDict(from_attributes=True)（含 shared auth）
- datetime.utcnow() 弃用清零：auth_service 3处统一改 datetime.now(timezone.utc)
- 同步文档：STATUS / ROADMAP / TECH_DEBT（D12清偿）/ AGENTS 代码地图

测试基线：126 passed, 4 skipped（无deprecation warning）

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

src/inventory/api/customer_routes.py

@@ -9,17 +9,15 @@
 
 路由前缀: /api/customers
 """
-from fastapi import APIRouter, Depends, Query, HTTPException
+from fastapi import APIRouter, Depends, Query
 from sqlalchemy.ext.asyncio import AsyncSession
-from sqlalchemy import select
 from typing import Optional, List
-from datetime import datetime
 
 from shared.database.database import get_db_session
 from shared.services.auth_service import get_current_active_user, get_current_admin_user
 from shared.models.identity import User
-from inventory.models import Customer
 from ..schemas import CustomerCreate, CustomerResponse
+from ..services.master_data_service import master_data_service
 
 router = APIRouter(prefix="/customers", tags=["客户管理"])
 
@@ -32,12 +30,7 @@ async def list_customers(
     db_session: AsyncSession = Depends(get_db_session),
     current_user: User = Depends(get_current_active_user)
 ):
-    query = select(Customer).where(Customer.is_active == True)
-    if search:
-        query = query.where(Customer.name.ilike(f"%{search}%"))
-    query = query.offset(skip).limit(limit).order_by(Customer.created_at.desc())
-    result = await db_session.execute(query)
-    return [CustomerResponse.from_orm(c) for c in result.scalars().all()]
+    return await master_data_service.list_customers(db_session, skip, limit, search)
 
 
 @router.post("", response_model=CustomerResponse, status_code=201)
@@ -46,15 +39,7 @@ async def create_customer(
     db_session: AsyncSession = Depends(get_db_session),
     current_user: User = Depends(get_current_active_user)
 ):
-    data = customer_data.dict()
-    if not data.get("code"):
-        data["code"] = f"C{datetime.now().strftime('%Y%m%d%H%M%S')}"
-    
-    customer = Customer(**data)
-    db_session.add(customer)
-    await db_session.flush()
-    await db_session.refresh(customer)
-    return CustomerResponse.from_orm(customer)
+    return await master_data_service.create_customer(db_session, customer_data, current_user)
 
 
 @router.put("/{customer_id}", response_model=CustomerResponse)
@@ -64,17 +49,7 @@ async def update_customer(
     db_session: AsyncSession = Depends(get_db_session),
     current_user: User = Depends(get_current_active_user)
 ):
-    result = await db_session.execute(select(Customer).where(Customer.id == customer_id))
-    customer = result.scalar_one_or_none()
-    if not customer:
-        raise HTTPException(status_code=404, detail="客户不存在")
-    
-    for key, value in customer_data.dict().items():
-        setattr(customer, key, value)
-    
-    await db_session.flush()
-    await db_session.refresh(customer)
-    return CustomerResponse.from_orm(customer)
+    return await master_data_service.update_customer(db_session, customer_id, customer_data, current_user)
 
 
 @router.delete("/{customer_id}")
@@ -83,11 +58,4 @@ async def delete_customer(
     db_session: AsyncSession = Depends(get_db_session),
     current_user: User = Depends(get_current_admin_user)
 ):
-    result = await db_session.execute(select(Customer).where(Customer.id == customer_id))
-    customer = result.scalar_one_or_none()
-    if not customer:
-        raise HTTPException(status_code=404, detail="客户不存在")
-    
-    customer.is_active = False
-    await db_session.flush()
-    return {"message": "客户已删除"}
+    return await master_data_service.delete_customer(db_session, customer_id, current_user)