refactor(bootstrap): move runtime init from router to cmd layer

Extract SyncEvents and InitLogWriter from router.Serve into bootstrap.Init
called from cmd entry points with trace-aware context. Preserve existing
Register* wiring for task and push domain integrations.

internal/cmd/worker.go

@@ -7,6 +7,7 @@ package cmd
 import (
 	"log"
 
+	"github.com/Rain-kl/Wavelet/internal/bootstrap"
 	"github.com/Rain-kl/Wavelet/internal/task/worker"
 
 	"github.com/spf13/cobra"
@@ -16,6 +17,7 @@ var workerCmd = &cobra.Command{
 	Use:   "worker",
 	Short: "wavelet Worker",
 	Run: func(_ *cobra.Command, _ []string) {
+		runBootstrap(bootstrap.Options{})
 		log.Println("[Worker] 启动任务处理服务")
 		if err := worker.StartWorker(); err != nil {
 			log.Fatalf("[工作器] 启动失败: %v", err)