feat: planned structure

internal/service/service.go

@@ -1,10 +1,22 @@
 package service
 
+import (
+	"context"
+)
+
 type Service struct {
 	redis      Redis
 	downloader Downloader
 }
 
-func New() *Service {
-	return &Service{}
+func New(redis Redis, downloader Downloader) *Service {
+	return &Service{
+		redis:      redis,
+		downloader: downloader,
+	}
+}
+
+// DownloadWeatherData downloads weather forecast data using the configured downloader
+func (s *Service) DownloadWeatherData(ctx context.Context) error {
+	return s.downloader.Download(ctx)
 }