refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

internal/task/utils.go

@@ -0,0 +1,66 @@
+// Copyright 2025 linux.do
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package task
+
+import (
+	"github.com/Rain-kl/Wavelet/internal/config"
+	"github.com/hibiken/asynq"
+)
+
+// RedisOpt asynq Redis 连接配置（兼容 Standalone/Sentinel/Cluster）
+var RedisOpt asynq.RedisConnOpt
+
+// AsynqClient asynq 客户端，用于任务入队
+var AsynqClient *asynq.Client
+
+func init() {
+	RedisOpt = NewRedisConnOpt()
+	AsynqClient = asynq.NewClient(RedisOpt)
+}
+
+// NewRedisConnOpt 根据配置返回对应的 asynq Redis 连接选项
+func NewRedisConnOpt() asynq.RedisConnOpt {
+	cfg := config.Config.Redis
+	addrs := cfg.Addrs
+
+	if cfg.ClusterMode {
+		return asynq.RedisClusterClientOpt{
+			Addrs:    addrs,
+			Username: cfg.Username,
+			Password: cfg.Password,
+		}
+	}
+
+	if cfg.MasterName != "" {
+		return asynq.RedisFailoverClientOpt{
+			MasterName:    cfg.MasterName,
+			SentinelAddrs: addrs,
+			Username:      cfg.Username,
+			Password:      cfg.Password,
+			DB:            cfg.DB,
+		}
+	}
+
+	addr := "localhost:6379"
+	if len(addrs) > 0 {
+		addr = addrs[0]
+	}
+	return asynq.RedisClientOpt{
+		Addr:     addr,
+		Username: cfg.Username,
+		Password: cfg.Password,
+		DB:       cfg.DB,
+		PoolSize: cfg.PoolSize,
+	}
+}
+
+// PrefixedQueue 返回带前缀的队列名，用于 Cluster 模式隔离
+func PrefixedQueue(queue string) string {
+	prefix := config.Config.Redis.KeyPrefix
+	if prefix == "" {
+		return queue
+	}
+	return prefix + queue
+}