Change tootctl to use inline parallelization instead of Sidekiq (#11776)

- Remove --background option
- Add --concurrency(=5) option
- Add progress bars

app/models/media_attachment.rb

@@ -129,6 +129,7 @@ class MediaAttachment < ApplicationRecord
   scope :unattached, -> { where(status_id: nil, scheduled_status_id: nil) }
   scope :local,      -> { where(remote_url: '') }
   scope :remote,     -> { where.not(remote_url: '') }
+  scope :cached,     -> { remote.where.not(file_file_name: nil) }
 
   default_scope { order(id: :asc) }
 

app/models/preview_card.rb

@@ -43,6 +43,8 @@ class PreviewCard < ApplicationRecord
   validates_attachment_size :image, less_than: LIMIT
   remotable_attachment :image, LIMIT
 
+  scope :cached, -> { where.not(image_file_name: [nil, '']) }
+
   before_save :extract_dimensions, if: :link?
 
   def save_with_optional_image!