refactor(backend): run dataset scheduler separately

backend/cmd/scheduler/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"context"
+	"log"
+	"senlinai-agent/backend/internal/config"
+	"senlinai-agent/backend/internal/crontab"
+	"senlinai-agent/backend/internal/logic/dataset"
+	"senlinai-agent/backend/internal/models"
+)
+
+func main() {
+	cfg := config.Load()
+
+	err := models.New(cfg.DSN)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	datasetService := dataset.NewService(models.DBService)
+	datasetScheduler := crontab.NewDatasetScheduler(datasetService, log.Default())
+	schedulerContext, stopScheduler := context.WithCancel(context.Background())
+	defer stopScheduler()
+	go datasetScheduler.Run(schedulerContext)
+}