feat: 实现基于 Redis 的延迟任务队列和工作器，支持周期性交易处理等后台任务调度。

internal/mq/init.go

@@ -0,0 +1,95 @@
+package mq
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"accounting-app/internal/repository"
+
+	"github.com/redis/go-redis/v9"
+	"gorm.io/gorm"
+)
+
+// RecurringTaskSystem 周期性交易任务系统
+type RecurringTaskSystem struct {
+	Queue   *TaskQueue
+	Worker  *TaskWorker
+	Handler *RecurringTransactionHandler
+}
+
+// InitRecurringTaskSystem 初始化周期性交易任务系统
+// 需要 Redis 连接来存储任务队列
+func InitRecurringTaskSystem(
+	ctx context.Context,
+	redisClient *redis.Client,
+	db *gorm.DB,
+	pollInterval time.Duration,
+	workerCount int,
+) (*RecurringTaskSystem, error) {
+	log.Println("[MQ] Initializing recurring task system...")
+
+	// 创建任务队列
+	taskQueue := NewTaskQueue(redisClient, "novault:tasks")
+
+	// 创建任务 Worker
+	worker := NewTaskWorker(taskQueue, pollInterval, workerCount)
+
+	// 创建周期性交易处理器
+	recurringRepo := repository.NewRecurringTransactionRepository(db)
+	transactionRepo := repository.NewTransactionRepository(db)
+	accountRepo := repository.NewAccountRepository(db)
+
+	handler := NewRecurringTransactionHandler(
+		db,
+		recurringRepo,
+		transactionRepo,
+		accountRepo,
+		taskQueue,
+	)
+
+	// 注册处理器
+	worker.RegisterHandler(TaskTypeRecurringTransaction, handler.Handle)
+
+	system := &RecurringTaskSystem{
+		Queue:   taskQueue,
+		Worker:  worker,
+		Handler: handler,
+	}
+
+	// 启动时调度所有活跃的周期性交易
+	if err := handler.ScheduleAllActive(ctx); err != nil {
+		log.Printf("[MQ] Warning: failed to schedule active recurring transactions: %v", err)
+	}
+
+	// 处理逾期任务（补偿机制）
+	if err := handler.ProcessOverdue(ctx); err != nil {
+		log.Printf("[MQ] Warning: failed to process overdue transactions: %v", err)
+	}
+
+	log.Println("[MQ] Recurring task system initialized successfully")
+	return system, nil
+}
+
+// Start 启动任务系统
+func (s *RecurringTaskSystem) Start(ctx context.Context) {
+	log.Println("[MQ] Starting recurring task worker...")
+	s.Worker.Start(ctx)
+}
+
+// Stop 停止任务系统
+func (s *RecurringTaskSystem) Stop() {
+	log.Println("[MQ] Stopping recurring task worker...")
+	s.Worker.Stop()
+}
+
+// GetStats 获取系统统计信息
+func (s *RecurringTaskSystem) GetStats(ctx context.Context) map[string]interface{} {
+	queueStats, _ := s.Queue.GetQueueStats(ctx)
+	workerStats := s.Worker.GetStats()
+
+	return map[string]interface{}{
+		"queue":  queueStats,
+		"worker": workerStats,
+	}
+}