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/shared/services/auth_routes.py

@@ -1,7 +1,7 @@
 from fastapi import APIRouter, Depends, HTTPException, status
 from fastapi.security import OAuth2PasswordRequestForm
 from sqlalchemy.ext.asyncio import AsyncSession
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, ConfigDict, Field
 from typing import Optional, List
 from datetime import timedelta
 from sqlalchemy import select
@@ -31,8 +31,7 @@ class UserResponse(BaseModel):
     is_superuser: bool = False
     roles: List[str]
 
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 
 class Token(BaseModel):
@@ -60,8 +59,7 @@ class RoleResponse(BaseModel):
     is_system: bool
     permissions: List[str]
 
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 
 class PermissionCreate(BaseModel):
@@ -78,8 +76,7 @@ class PermissionResponse(BaseModel):
     module: Optional[str]
     description: Optional[str]
 
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 
 class UserCreate(BaseModel):