Fix mentions.account_id and mentions.status_id not having NOT NULL database constraints (#30591)

db/migrate/20240607093446_change_mention_status_id_non_nullable.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class ChangeMentionStatusIdNonNullable < ActiveRecord::Migration[7.1]
+  def change
+    add_check_constraint :mentions, 'status_id IS NOT NULL', name: 'mentions_status_id_null', validate: false
+  end
+end