refac: atomic merge, lost-update race, RunPurge cost, duplicated walks

internal/infrastructure/useCases/mediaRemover.go

@@ -1,6 +1,9 @@
 package useCases
 
-import "RenewCMS/internal/domain/image"
+import (
+	"RenewCMS/internal/domain/image"
+	"errors"
+)
 
 type mediaRemover struct {
 	imageRepository image.Repository
@@ -22,3 +25,8 @@ func (r mediaRemover) remove(img image.Image) error {
 	}
 	return r.imageRepository.Delete(img.ID)
 }
+
+func (r mediaRemover) discardFiles(img image.Image) error {
+	storedName := image.StoredName(img.Path)
+	return errors.Join(r.generated.purgeSource(storedName), r.storage.Delete(storedName))
+}