refactor(repository): 收敛 model/repository 分层为唯一持久化入口

将 OpenFlare 与平台业务的数据访问从 model 与 apps 直连迁入 repository，
model 仅保留实体与无 IO 规则；补充 code-check 架构守卫与开发规范。

internal/infra/task/scheduler/scheduler.go

@@ -11,8 +11,9 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/Rain-kl/Wavelet/internal/repository"
+
 	"github.com/Rain-kl/Wavelet/internal/infra/task"
-	"github.com/Rain-kl/Wavelet/internal/model"
 	"github.com/Rain-kl/Wavelet/internal/platform/bootstrap"
 	"github.com/Rain-kl/Wavelet/pkg/logger"
 
@@ -84,7 +85,7 @@ func ReloadScheduler() error {
 	}
 
 	// 2. 从数据库载入启用的定时任务配置
-	schedules, err := model.ListActiveSchedules(context.Background())
+	schedules, err := repository.ListActiveSchedules(context.Background())
 	if err != nil {
 		return fmt.Errorf("load schedules from db failed: %w", err)
 	}