多言語化の基盤作り (#55) (#421)

Reviewed-on: #421
Co-authored-by: miteruzo <miteruzo@naver.com>

backend/app/services/post_create_preflight.rb

@@ -15,9 +15,10 @@ class PostCreatePreflight
     @host = host
   end
 
-  def run
+  def run locale
     preview = PostImportPreviewer.new.preview_rows(
         rows: [preview_row],
+        locale:,
         fetch_metadata: false).first
     if preview[:existing_post_id].present?
       return {
@@ -53,7 +54,7 @@ class PostCreatePreflight
             original_created_from: preview[:attributes]['original_created_from'],
             original_created_before: preview[:attributes]['original_created_before'],
             duration: preview[:attributes]['duration'],
-            video_ms: preview[:attributes]['video_ms'] }).build!
+            video_ms: preview[:attributes]['video_ms'] }).build!(locale)
 
     {
         url: plan[:url],