* Modularize metabase.pulse; add metabase.pulse.core API namespace

* Rename metabase.pulse.send-test

* Split email result attachment stuff into its own namespace

* Update dashboard-subscription-test

* Allow metabase.email.result-attachment externally... for now

* More code cleanup

* Decouple models.card and email.messages

* Decouple models.collection and metabase.email.messages

* Hopefully the last fix 

* Fix #48647 

* Fix event handler

* :render/text, not :pulse/text

* Test fixes 

* Test fix 

* RESPECT the modules

* Remove unused namespace