also added a migration model
This reverts commit 84cfbd22fc.
84cfbd22fc
This reverts commit 832a56134b, reversing changes made to 75c3e6068c.
832a56134b
75c3e6068c
Also: * remove share visibilities where the shareable is already deleted * remove share visibilities where the user doesn't exist * remove `created_at` and `updated_at` to make the table smaller