Correctly use the Logger.exception method to capture exception backtraces if datadog timing logging fails

fixup! Only initialize formatters once, so that datadog is only initialized once, no matter how many plays are run

Only initialize formatters once, so that datadog is only initialized once, no matter how many plays are run

fixup! Pass playbook_timestamp into Formatters directly, rather than pulling it from callback_module

fixup! Pass playbook_timestamp into Formatters directly, rather than pulling it from callback_module