BURs: credit tag edits to DanbooruBot.

Credit tag edits that are performed as part of an alias, implication, or
mass update to DanbooruBot instead of the admin who approved the BUR.

app/logical/alias_and_implication_importer.rb

@@ -156,7 +156,7 @@ private
           tag_implication.reject!(update_topic: false)
 
         when :mass_update
-          TagBatchChangeJob.perform_later(token[1], token[2], CurrentUser.user, CurrentUser.ip_addr)
+          TagBatchChangeJob.perform_later(token[1], token[2], User.system, "127.0.0.1")
 
         when :change_category
           tag = Tag.find_by_name(token[1])

app/models/bulk_update_request.rb

@@ -77,7 +77,7 @@ class BulkUpdateRequest < ApplicationRecord
       transaction do
         CurrentUser.scoped(approver) do
           AliasAndImplicationImporter.new(script, forum_topic_id, "1", true).process!
-          update(status: "approved", approver: CurrentUser.user, skip_secondary_validations: true)
+          update!(status: "approved", approver: approver, skip_secondary_validations: true)
           forum_updater.update("The #{bulk_update_request_link} (forum ##{forum_post.id}) has been approved by @#{approver.name}.", "APPROVED")
         end
       end

app/models/tag_alias.rb

@@ -56,15 +56,15 @@ class TagAlias < TagRelationship
     tries = 0
 
     begin
-      CurrentUser.scoped(approver) do
-        update(status: "processing")
+      CurrentUser.scoped(User.system) do
+        update!(status: "processing")
         move_aliases_and_implications
         move_saved_searches
         ensure_category_consistency
         update_posts
         forum_updater.update(approval_message(approver), "APPROVED") if update_topic
         rename_wiki_and_artist
-        update(status: "active")
+        update!(status: "active")
       end
     rescue Exception => e
       if tries < 5
@@ -141,9 +141,7 @@ class TagAlias < TagRelationship
       Post.raw_tag_match(antecedent_name).find_each do |post|
         escaped_antecedent_name = Regexp.escape(antecedent_name)
         fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_antecedent_name}(?:\Z| )/, " #{consequent_name} ").strip
-        CurrentUser.scoped(creator, "127.0.0.1") do
-          post.update(tag_string: fixed_tags)
-        end
+        post.update(tag_string: fixed_tags)
       end
     end
   end
@@ -152,9 +150,7 @@ class TagAlias < TagRelationship
     antecedent_wiki = WikiPage.titled(antecedent_name).first
     if antecedent_wiki.present? 
       if WikiPage.titled(consequent_name).blank?
-        CurrentUser.scoped(creator, "127.0.0.1") do
-          antecedent_wiki.update(title: consequent_name, skip_secondary_validations: true)
-        end
+        antecedent_wiki.update!(title: consequent_name, skip_secondary_validations: true)
       else
         forum_updater.update(conflict_message)
       end
@@ -162,9 +158,7 @@ class TagAlias < TagRelationship
 
     if antecedent_tag.category == Tag.categories.artist
       if antecedent_tag.artist.present? && consequent_tag.artist.blank?
-        CurrentUser.scoped(creator, "127.0.0.1") do
-          antecedent_tag.artist.update!(name: consequent_name)
-        end
+        antecedent_tag.artist.update!(name: consequent_name)
       end
     end
   end

app/models/tag_implication.rb

@@ -134,7 +134,7 @@ class TagImplication < TagRelationship
       tries = 0
 
       begin
-        CurrentUser.scoped(approver) do
+        CurrentUser.scoped(User.system) do
           update(status: "processing")
           update_posts
           update(status: "active")
@@ -159,9 +159,7 @@ class TagImplication < TagRelationship
       Post.without_timeout do
         Post.raw_tag_match(antecedent_name).where("true /* TagImplication#update_posts */").find_each do |post|
           fixed_tags = "#{post.tag_string} #{descendant_names_string}".strip
-          CurrentUser.scoped(creator, "127.0.0.1") do
-            post.update(tag_string: fixed_tags)
-          end
+          post.update(tag_string: fixed_tags)
         end
       end
     end