refactor(architecture): eliminate internal package and complete cordis single-owner model and repository migration

- Physically purged all legacy internal/ packages, centralized pkg/model/ and pkg/repository/
- Migrated domain models and database repositories into self-contained owner plugins (user, auth, message_gateway, admin, upload, risk_control)
- Decoupled cross-plugin interactions via pure core/contracts and typed EventBus
- Ensured 100% test coverage pass, zero data races (-race clean), and 0 lint issues in make code-check

pkg/task/worker/middlewares.go

@@ -0,0 +1,21 @@
+// Copyright 2025 linux.do
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+// Package worker 提供 Asynq 任务处理服务器与中间件
+package worker
+
+import (
+	"context"
+
+	"github.com/hibiken/asynq"
+)
+
+// taskLoggingMiddleware 任务处理中间件
+// 注意：OTel Span 创建、日志记录、TaskExecution 状态管理
+// 已由 task.ProcessTask 统一处理，此中间件保留用于未来扩展（如限流、监控等）
+func taskLoggingMiddleware(h asynq.Handler) asynq.Handler {
+	return asynq.HandlerFunc(func(ctx context.Context, t *asynq.Task) error {
+		return h.ProcessTask(ctx, t)
+	})
+}