Added new spam_flag to Accounts, replacing is_flagged_as_spam

• Added:
- new spam_flag to Accounts, replacing is_flagged_as_spam
- null/0: no spam, 1: spam, 2: safe from spam

• Updated:
- Comment, Status to reflect changes

• Todo:
- Fully remove is_flagged_as_spam
- Update SortingQueryBuilder

app/controllers/admin/accounts_controller.rb

@@ -174,7 +174,7 @@ module Admin
     end
 
     def reset_spam
-      @account.is_flagged_as_spam = false
+      @account.spam_flag = Account::SPAM_FLAG_CLASS_MAP[:safe]
       @account.save!
       redirect_to admin_account_path(@account.id)
     end