* Revert "Rephrase error message"

This reverts commit f624443a96f27d5d448f3f5ee2bbb8d16f6371e0.

* Revert "Temporarily disable goal creation"

This reverts commit a091635b9d2dec65f482e461d04ca05bfd17ac4a.

* Update ecto schema

* Make sure goal operations are per site

* Update tests

* Split postgres migrations