feat(phase4): 全部业务模块迁移到 modules/（结构迁移）

- 21 个模块目录（auth/system/dictionary/configuration/cms/member/region/link/notice/job/log/upload/index）
- 每个模块 router.py（合并模块导出多个 router）/schemas.py/service.py/repository.py/models.py
- routers/v1.py 与 routers/__init__.py 改为直接引用 modules，前缀与权限串原样保留
- core/middleware.py 懒加载指向 modules.system.menu / modules.log；core/redis_client.py 指向 modules.job.scheduler
- apps/views|services|forms 全部改为 re-export 垫片
- 迁移后 grep 守门通过：modules/core 无 apps/extensions 残留引用
- 实测登录、27+ 模块接口、写操作 commit、操作日志落库均正常

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

modules/system/menu/schemas.py

@@ -0,0 +1,21 @@
+from typing import Any, List, Optional
+
+from pydantic import BaseModel, Field
+
+
+# 菜单表单验证
+class MenuForm(BaseModel):
+    id: Optional[int] = Field(None, description="菜单ID")
+    title: str = Field(..., min_length=1, max_length=150, description="菜单标题")
+    icon: Optional[str] = Field(None, max_length=50, description="菜单图标")
+    path: Optional[str] = Field(None, max_length=255, description="路由地址")
+    component: Optional[str] = Field(None, max_length=255, description="组件路径")
+    parent_id: int = Field(..., ge=0, description="上级ID")
+    type: Optional[int] = Field(None, ge=0, le=1, description="菜单类型")
+    target: Optional[str] = Field(None, max_length=30, description="打开方式")
+    permission: Optional[str] = Field(None, max_length=150, description="权限节点")
+    hide: Optional[int] = Field(None, ge=0, le=1, description="是否可见")
+    status: int = Field(..., ge=1, le=2, description="菜单状态")
+    sort: int = Field(..., ge=0, le=99999, description="菜单排序")
+    note: Optional[str] = Field(None, max_length=255, description="菜单备注")
+    checked_list: Optional[List[int]] = Field(default=[], description="权限节点")