refactor(AdminPermissionService): 优化权限和角色编码重复校验逻辑

1.  将链式查询拆分为分步Where调用，使用WhereIF简化条件判断
2.  修复空值处理问题，使用id!.Value替代原值访问
3.  新增数据库菜单初始化脚本，补充Dockerfile和dotnet工具配置

QYZH.InteractiveMagazine.Service/AdminPermissionService.cs

@@ -310,7 +310,9 @@ public class AdminPermissionService(
 
         var code = input.Code.Trim();
         var codeExists = await adminMenuRepository.Queryable()
-            .AnyAsync(x => x.Code == code && !x.IsDeleted && (!id.HasValue || x.Id != id.Value));
+            .Where(x => x.Code == code && !x.IsDeleted)
+            .WhereIF(id.HasValue, x => x.Id != id!.Value)
+            .AnyAsync();
         BusinessException.ThrowIf(codeExists, "权限编码已存在", ResultCode.CONFLICT);
     }
 
@@ -321,7 +323,9 @@ public class AdminPermissionService(
 
         var code = input.Code.Trim();
         var codeExists = await adminRoleRepository.Queryable()
-            .AnyAsync(x => x.Code == code && !x.IsDeleted && (!id.HasValue || x.Id != id.Value));
+            .Where(x => x.Code == code && !x.IsDeleted)
+            .WhereIF(id.HasValue, x => x.Id != id!.Value)
+            .AnyAsync();
         BusinessException.ThrowIf(codeExists, "角色编码已存在", ResultCode.CONFLICT);
 
         await ValidateMenuIdsAsync(input.MenuIds);