Revert `update_columns` -> `update!` when rebaking/post-processing post.

Revert update_columns -> update! when rebaking/post-processing post.

update! goes through validation which means old posts that doesn’t adhere to the existing validations will raise an error.

diff --git a/app/jobs/regular/process_post.rb b/app/jobs/regular/process_post.rb
index cd99dec..d6b3afa 100644
--- a/app/jobs/regular/process_post.rb
+++ b/app/jobs/regular/process_post.rb
@@ -32,7 +32,7 @@ module Jobs
           # TODO suicide if needed, let's gather a few here first
           Rails.logger.warn("Cooked post processor in FATAL state, bypassing. You need to urgently restart sidekiq\norig: #{orig_cooked}\nrecooked: #{recooked}\ncooked: #{cooked}\npost id: #{}")
-          post.update!(cooked: cp.html)
+          post.update_column(:cooked, cp.html)
           post.publish_change_to_clients! :revised
diff --git a/app/models/post.rb b/app/models/post.rb
index b835fea..8bca8c5 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -603,7 +603,7 @@ class Post < ActiveRecord::Base
     new_cooked = cook(raw, topic_id: topic_id, invalidate_oneboxes: invalidate_oneboxes)
     old_cooked = cooked
-    self.update!(
+    update_columns(
       cooked: new_cooked,
       baked_version: BAKED_VERSION

GitHub sha: 8794d940